Moslem Fattahi

Moslem Fattahi
Abadan Faculty of Petroleum Engineering · Chemical Engineering

PhD
Senior Researcher

About

80
Publications
30,269
Reads
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2,240
Citations
Citations since 2016
35 Research Items
2099 Citations
20162017201820192020202120220100200300400500600700
20162017201820192020202120220100200300400500600700
20162017201820192020202120220100200300400500600700
20162017201820192020202120220100200300400500600700
Introduction
Google scholar ---------................................................................... https://scholar.google.com/citations?user=nPWeXRkAAAAJ&hl=en ............................................................................ Publons ===================================== https://publons.com/researcher/3041865/moslem-fattahi/
Additional affiliations
February 2014 - March 2020
Petroleum University of Technology
Position
  • Lecturer
Description
  • Taught Courses • Mass Transfer Operations • Kinetic and Reactor Design • Applied Math in Chemical Engineering • Applied Computer in Chemical Engineering • Fundamentals of Industrial Catalysts • Introduction to CFD • Advanced Mathematical Engineering
Education
September 2009 - November 2013
Sharif University of Technology
Field of study
  • Chemical Engineering

Publications

Publications (80)
Article
Oxidative dehydrogenation of propane (ODHP) in a fixed bed reactor over synthesized vanadia nanocatalysts was investigated physicochemically. Several vanadium pentoxide (V2O5) nanostructures including rod-, belt-, tube-, needle- and flower-likes were successfully synthesized via the reflux and hydrothermal processes utilizing different templates su...
Article
A series of V2O5 catalysts supported on multiwall carbon nanotube (MWCNT), single wall carbon nanotube (SWCNT), and graphene were synthesized by hydrothermal and reflux methods for oxidative dehydrogenation of propane (ODHP) to propylene. The catalysts were characterized by techniques including the BET surface area measurements, XRD, FTIR, H2-TPR,...
Article
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The present investigation considers the fully developed electro-osmotic flow of power-law fluids in a planar microchannel subject to constant wall heat fluxes. Using an approximate velocity distribution, closed form expressions are obtained for the transverse distribution of temperature and Nusselt number. The approximate solution is found to be qu...
Article
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In this work, a simple sol-gel method was used to fabricate a ternary nanocomposite of Fe-doped TiO 2 decorated on reduced graphene oxide (Fe-doped TiO 2 /rGO). XRD, Raman shift, FT-IR, BET, DRS, EIS, TEM, FESEM, EDX and EDS techniques were applied for characterization of the structural, optical, and surface morphological properties of the synthesi...
Article
Full-text available
In the current investigation, an application of the design of experiments (DOE) along with the artificial neural networks (ANN) in a kinetic study of oxidative dehydrogenation of propane (ODHP) reaction over a synthesized vanadium–graphene catalyst at 400–500 °C presented aiming at minimizing the COx production. In this venue, the main and side rea...
Article
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Water contamination due to the artificial dyes from domestic and industrial wastewater is one of the most crucial environmental issues and problems that the use of an effective adsorbent for dye adsorption seems necessary. In the present study, calcium alginate hydrogels reinforced with cellulose nanocrystals (CA/CNC) as a green and cost-effective...
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Amongst many chemical pollutants that cause environmental pollution, the presence of organic dyes in water resources can cause substantial health issues. Thus, owing to their mutagenicity and their adverse effects on human health, environment, and animals, they must be removed from industrial wastewater. In this study, UiO-66 metal–organic framewor...
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Cellulose nanocrystals (CNCs) are one of the most useful materials that have recently been used in various fields. There are many natural resources on earth from which CNC can be extracted in a variety of methods. This study focuses on the extraction of CNCs from waste cotton fibers (WCFs) by sulfuric acid hydrolysis. Physicochemical characterizati...
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Various nanocomposites of TiO 2 –ZnO, TiO 2 –ZnO/CS, and TiO 2 –ZnO/CS–Gr with different molar ratios were synthesized by sol–gel and ultrasound-assisted methods and utilized under UV irradiation to enhance the photocatalytic degradation of tetracycline. Characterization of prepared materials were carried out by XRD, FT-IR, FE-SEM, EDX and BET tech...
Article
Oxidative dehydrogenation of light alkanes is an attractive route for production of olefins. This method does not need much amount of energy, while common processes such as propane dehydrogenation and cracking required external energy resources and cause to rapid catalyst deactivation. In this research, an isothermal one-dimensional modeling of fix...
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This work aimed at developing a natural compound-based hydrogel adsorbent to remove diclofenac as a model pharmaceutical from water. First, graphene oxide–chitosan (GO–CTS) and amine graphene oxide–chitosan (AGO–CTS) hydrogel adsorbents were synthesized via a facile mechanical mixing method. The synthesized materials were characterized through Four...
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In this study, TiO2/ZnO nanostructures were synthesized by sol–gel solid-state dispersion method and hydrothermal methods for degradation of Rhodamine B (RhB). The ZnO weight percentage, calcination temperature and irradiation time were investigated for synthesizing the different catalyst samples. Then, the X-ray diffraction, Brunauer–Emmett–Teller...
Article
SMBRs are hybrid reactors that perform the reaction and separation process simultaneously in a unit. The high separability along with overcoming the equilibrium constraints on the reaction has made them effective to be used in a wide range of equilibrium reactions such as isomerization, esterification, etherification, acetylation, enzymatic reactio...
Article
Global warming is becoming a critical issue in 21st century which is mainly due to the growing rate of greenhouse gas emissions. This is mostly due to the large amount of CO2 emission from power generation activity using fossil fuels. One of the main methods of fighting global warming and reducing CO2 emission into atmosphere is to perform carbon c...
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Increasing the number of depleted reservoirs and global demand for energy have left us with low alternative but to use new ways to extract more hydrocarbon. Amongst different material used for tertiary oil recovery, surfactant injection has proved very promising solutions, such as interfacial tension reduction and wettability alteration. Without an...
Article
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Transition metal sulfide semiconductors have achieved significant attention in the field of photocatalysis and degradation of pollutants. MoS2 with a two dimensional (2D) layered structure, a narrow bandgap and the ability of getting excited while being exposed to visible light, has demonstrated great potential in visible-light-driven photocatalyst...
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Rising global energy demand has encouraged engineers to create and design new methods to improve oil recovery from reservoirs. In this study, feasibility of using Henna extract as a natural surfactant and synthesized nanoparticles (Titanium dioxide (TiO2), Silicon dioxide (SiO2), Graphene and composite of TiO2-Graphene) for reduction of oil-water i...
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Nowadays, underbalanced drilling (UBD) technology is widely applicable in the petroleum industry due to its advantages to an overbalanced drilling operation. UBD success depends on maintaining the drilling fluid circulating pressure below the reservoir pore pressure during operations. One of the main prerequisites of a successful UBD operation is t...
Article
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The presence of dyes and benzoic derivatives in wastewater and water resources is one of the issues gaining global attention. Persistence, toxicity, and carcinogenic potential of these compounds create a severe impact on aquatics and human beings which make its removal essential before discharging into the environment. Photocatalytic processes driv...
Article
The study of rheological properties is one of the essential aspects in designing drilling mud and its performance in operational conditions. The adding nanoparticles and natural polymers such as starch in drilling mud is the one way for modifying rheological properties. In this research, rheological behavior of a water-based drilling mud containing...
Article
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Hydraulic fracturing is an important method utilized to enhance oil and gas recovery from reservoirs, especially for low-permeability formations. It has been broadly used in gas reservoirs, especially tight formations. Gas condensate reservoirs (GCR) experience a noticeable loss of productivity after achieving dew point pressure and condensate drop...
Article
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anchored on a reduced graphene oxide (rGO) ternary nanocomposite heterojunction was synthesized via the multi-step method including hydrothermal, solvothermal and sol-gel methods. XRD, Raman, FESEM, EDX, Dot Mapping EDS, BET, FTIR, UV-VIS, TGA, and EIS techniques were utilized for characterizing as-synthesized catalysts. The XRD and Raman data prov...
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The present study deals with investigating the influences of the streaming potential and a non-linear rheology of the carrier fluid on mass transport and surface reactions in heterogeneous microreactors. To this end, the PTT viscoelastic model is used to predict the non-linear behavior of the fluid. The governing equations are solved in a dimension...
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در اين تحقيق غلظت آنزيم نفوذ‌کننده در يک کاتاليست کروي امولسيون شده با حل معادله واکنش-نفوذ مورد بررسي قرار گرفته است. سينيتک فرض‌شده براي نفوذ آنزيم مکانيزم ميکائليس-منتن مي باشد که معادله توزيع غلظت را تبديل به يک معادله ديفرانسيل معمولي غير خطي مرتبه دوم با ضرايب متغير مي‌کند. لذا براي حل اين معادله روش‌هاي تحليلي هوموتوپي، تقريب درجه سوم و عددي...
Article
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Estimation of rock mechanic parameters is an important issue in reservoir management. Uniaxial compressive strength (UCS) and elastic modulus are the most important factors in determining the rock mechanic parameters in petroleum engineering studies. Accessibility to the parameters in fields such as designing fracture, analyzing of wellbore stabili...
Article
In this work, a simple sol-gel method was used to fabricate a ternary nanocomposite of Fe-doped TiO2 decorated on reduced graphene oxide (Fe-doped TiO2/rGO). XRD, Raman shift, FT-IR, BET, DRS, EIS, TEM, FESEM, EDX and EDS techniques were applied for characterization of the structural, optical, and surface morphological properties of the synthesized...
Article
Full-text available
This work reports the synthesis of nanocomposites of Fe3O4–TiO2–Ag with different weight concentrations of iron (Fe) and silver (Ag) doped on TiO2. The nanocomposites were prepared by a novel and facile ultrasonic-assisted hydrothermal method, and their effectiveness was evaluated for photocatalytic degradation. X-ray diffraction, scanning electron...
Conference Paper
In this research, the enzymes concentration in a spherical immobilized biocatalyst through the reaction-diffusion equation has been investigated. The Michaelis-Menten type was utilized for kinetic mechanism of enzymes reaction. The obtained equation is a second order nonlinear ordinary differential equation (ODE) with variable coefficients. So, the...
Article
Background: The aim of present work, was to synthesize the titanium nanoparticles (TNPs) and titanium nanotubes (TNTs) through the hydrothermal method with different precursors including the Titanium(IV) isopropoxide (TTIP) and Titanium(IV) bis(ammonium lactato)dihydroxide (TALH). Methods: TiO2 nanostructures from different titania precursors as...
Conference Paper
Full-text available
Copper and nitrogen co-doped TiO2 as heterogeneous photocatalysts via sol-gel method were successfully synthesized in this investigation. The as-synthesized catalysts were characterized with X-ray diffraction (XRD), UV-Vis diffuse reflectance spectra (DRS), surface area measurements (BET and BJH), Fourier transform infrared spectroscopy (FT-IR) and...
Article
The titanate nanotube/single-wall carbon nanotube (TNT/SWCNT) nanocomposites from different titania precursors were prepared by a two-step hydrothermal process. These nanocomposites were characterized by XRD, BET, Raman, FESEM, TEM, EDX, EDS, EIS, UV–vis DRS and FTIR techniques. The FESEM and TEM images showed the high porous nanocomposites with tw...
Article
This work aimed to synthesize Fe-TiO2-Ag nano composite by a novel ultrasonic assisted hydrothermal method followed by evaluation of its efficiency for photocatalytic degradation of 4-chlorophenol (4-CP) in aqueous solution. X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and N2 adsorption...
Article
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Drilling fluid is one of the most important and expensive aspects of any drilling process. Colloidal Gas Aphron (CGA) has been found e�ective in controlling the �ltration rate by bridging the pores of the reservoir rock; hence, reducing the formation damage. This work aims to synthesize the CGA in water based drilling fluids to study the stability,...
Article
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V2O5/SiO2 catalyst utilized to oxidize the SO2 to SO3 species in the presence of oxygen mainly for producing sulfuric acid. For this catalyst, the active phase was a mixture of vanadium pentoxide and basic sulfate/pyrosulfate material. This active phase at the reaction temperature behaved as a liquid filling up the pores of the silica support. On t...
Article
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In the present study, a theoretical model of a reaction–diffusion within an entrapped-cell photobioreactor packed with gel-granules containing immobilized photosynthetic bacterial cells is presented. The model is based on a system of two coupled nonlinear reaction–diffusion equations under steady-state condition for biochemical reactions occurring...
Article
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In this paper, oxidation of H2S into elemental sulfur over synthesized aluminabased nanocatalysts was physiochemically investigated and the results were compared with a commercial Claus catalyst. The wet chemical, co-precipitation, and spray pyrolysis techniques were employed to synthesize several alumina nanostructures. Then, the SEM, XRD, and ASA...
Article
Full-text available
Samples of V2O5 catalysts supported on nanostructures of TiO2 and γ-Al2O3 were synthesized through the hydrothermal method and used for the oxidative dehydrogenation of propane (ODHP) to propylene. The TiO2 support was utilized in both commercial microstructure and synthesized nanostructure forms. Moreover, the γ-Al2O3 support was synthesized throu...
Article
In this research, a mathematical model to simulate a two-phase fluidized bed reactor for oxidative dehydrogenation of propane to propylene was developed. The developed model was solved numerically using the matlab software. Moreover, effects of the reaction temperature, operating pressure, feed composition, particle's size and gas superficial veloc...
Article
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An industrial scale propylene production via oxidative dehydrogenation of propane (ODHP) in multi-tubular reactors was modelled. Multi-tubular fixed-bed reactor used for ODHP process, employing 10000 of small diameter tubes immersed in a shell through a proper coolant flows. Herein, a theory-based pseudo-homogeneous model to describe the operation...
Article
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Catalytic paraffin dehydrogenation for manufacturing olefins considered to be one of the most significant production routes in the petrochemical industries. In this research, a reactor kinetic model for the dehydrogenation of propane to propylene through a radial flow reactor over the Pt-Sn/Al2O3 catalyst was investigated. The model showed that, th...
Article
A new nonlinear optimization method for parameter estimation in Michaelis-Menten equation has been developed. This method is based on a special mathematical form of the Michaelis-Menten equation to finding the best fit of the linear plot of R versus S/(S + Km) where R, S, and Km are the reaction rate, concentration of substrate, and the Michaelis-M...
Article
Full-text available
In the present study, a heterogeneous and homogeneous gas flow dispersion model for simulation and optimization of a large-scale catalytic slurry reactor for the direct synthesis of dimethyl ether (DME) from synthesis gas (syngas) and CO2, using a churn-turbulent regime was developed. In the heterogeneous flow model, the gas phase was distributed i...
Article
In this investigation, a mathematical model for HDS of diesel fuel in a slurry bubble column reactor was developed. The model is based on the axial dispersion of the heterogeneous gas flow regime, which includes two various bubble classes: large (20 ± 70 mm) and small (1 ± 10 mm). By assuming only large or large plus small bubbles in the column, si...
Article
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Catalyst deactivation and its environmental consequences are believed to be an important issue seriously needed to be dealt with. In this study, a mathematical model of a spherical bed along with the catalyst deactivation in a long-term operation period for the methanol synthesis was investigated. The inside space of the two spheres reactor configu...
Article
In this study, mathematical modeling of fixed-bed plasma reactor operated under isothermal condition was investigated. In this process, methane and acetylene were the inputted feed and ethane, ethylene, propylene, propane, i-butane, and n-butane were the output products. The amount of methane conversion obtained was 12.7% for the former feed, howev...
Article
In this research the application of design of experiment (DOE) coupled with the artificial neural networks (ANN) in kinetic study of oxidative dehydrogenation of propane (ODHP) over a vanadium-graphene catalyst at 400-500 degrees C and a method of data collection/fitting for the experiments were presented. The proposed reaction network composed of...
Article
In this study, a comprehensive three-dimensional dynamic model was developed for simulating the flow behavior and catalytic coupling reactions for direct synthesis of dimethyl ether (DME) from syngas including CO2 in a fixed bed reactor at commercial scale under both adiabatic and isothermal conditions. For this purpose, a computational fluid dynam...
Article
Full-text available
A reduction in catalyst's activity with time-on-stream and the formation of side products are two of the problems associated with catalytic propane dehydrogenation (PDH). Previous studies have indicated that the presence of small amounts of oxygenated additives such as water can reduce coke formation and enhance catalyst activity. The aim of the pr...
Article
A number of HZSM-5 catalysts modified with 5 wt% Mg, Na, Zr, and Al as well as others modified with 5–60 wt% Zn prepared by wet impregnation. These materials were characterized by the NH3-TPD, XRF, and XRD analyses and tested in a slurry reactor to determine their activities in dehydration of methanol solution in kerosene. Reactions were carried ou...
Article
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Methanol conversion was investigated on dealuminated mordenite (DM) as well as a series of promoted DM (i.e., metal/DM) catalysts prepared by impregnation. Prepared catalysts characterized by the powder XRD, BET, and NH3-TPD techniques. Chemical analysis was performed using induced coupled plasma (ICP) method. The conversion of methanol over differ...
Article
Dynamic modeling of a double-pipe heat exchanger is the subject of the current study. The basis of this study is the same velocity of vapor and liquid phases or, in other words, homogeneous phase, in the annulus part of the exchanger. The model can predict the temperature and vapor quality along the axial pipe from the pipe inlet up to a distance w...
Article
A mathematical model for a fixed bed radial flow catalytic reactor was developed for dehydrogenation of heavy paraffins over Pt-Sn/Al2O3 catalyst. The model included appropriate kinetic rate expressions for the main dehydrogenation reaction as well as side reactions and catalyst deactivation. The reactor model consisted of a set of partial and ordi...
Article
Full-text available
In this research, a new transient mathematical model based upon tanks-in-series configuration was developed to simulate the direct synthesis of dimethyl ether (DME) from syngas in a commercial-scale slurry bubble column reactor. A comparison between the simulation results and experimental data showed that the applied model might acceptably describe...
Article
Full-text available
Dimethyl ether (DME) as a clean fuel seems to be a superior candidate for high-quality diesel fuel in near future. In this study, a comprehensive three-dimensional dynamic heterogeneous model developed to simulate the flow behavior and catalytic coupling reactions for synthesis of the DME from hydrogenation of the CO and CO2, dehydration of methano...
Article
Full-text available
An industrial-scale reactor for ethylene production was modeled using the oxidative dehydrogenation of ethane (ODHE) in a multi-tubular reactor system, examining a variety of parameters affecting reactor performance. The model showed that a double-bed multi-tubular reactor with intermediate air injection scheme was superior to a single-bed design,...
Article
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The effect of oxygenate additives, water and methanol, to the feed on the performance of industrial Pt–Sn/γ-Al2O3 catalyst in dehydrogenation of propane was studied by neural network modeling. Because of the complex nature of the system and very low levels of oxygenate addition, neural networks were employed as an efficient and accurate tool to obt...
Article
Full-text available
In the present study, we developed a multi-component one-dimensional mathematical model for simulation and optimisation of a commercial catalytic slurry reactor for the direct synthesis of dimethyl ether (DME) from syngas and CO2, operating in a churn-turbulent regime. DME productivity and CO conversion were optimised by tuning operating conditions...
Article
A reduction in catalyst activity with time-on-stream and formation of side products are the major problems associated with catalytic propane dehydrogenation. Coke formation on the catalyst surface is the most important cause for catalyst deactivation. Experiments have indicated that the presence of very small amounts of oxygenated additives such as...
Article
Dye sensitizers loaded on TiO2 decrease the electron excitation energy, thereby improving the photocatalytic performance by causing an increase in sensitivity under visible light irradiation. Three dye sensitizer precursors, Mordant Orange 1, N3 (red dye) and Cobalt (II) Phthalocyanine Tetrasulfonate (CoPcTs), were utilized to load the photocatalys...
Article
The FT reaction involves the conversion of syngas which is derived from natural gas or coal to different kinds of products according to the operating conditions and the type of the catalyst. In other words, it is a practical way to convert solid fuel (coal) and natural gas to various hydrocarbons (C1-C60) and oxygenates such as alkanes, alkenes etc...
Article
Full-text available
The aim of this study was to develop an appropriate kinetic model for propane dehydrogenation (PDH) over an industrial Pt–Sn/γ-Al2O3 catalyst in the presence of small amounts of oxygenated compounds. Experimental data were obtained from a previous study where catalytic PDH was carried out in a laboratory scale reactor at atmospheric pressure in the...
Article
Full-text available
Desalting plants are often installed in crude oil production units in order to remove water-soluble salts from an oil stream. Experiments in both the laboratory and field have shown the desalting process parameters to be very complicated.This research reflects the results of a study conducted regarding the impact of operational desalting parameters...
Article
In this study, mathematical modelling of oxidative coupling of methane (OCM) to C2 hydrocarbons (C2H6 and C2H4) over La2O3/CaO catalyst in a fixed-bed reactor operated under isothermal and non-isothermal conditions was investigated using the MATLAB program. In this process, methane and acetylene were the inputted feed and ethane, ethylene, propylen...
Article
Full-text available
In this research, data on liquid-liquid extraction of platinum from commercial spent catalysts by trioctylphosphine oxide (TOPO) in toluene were experimentally obtained. Alkaline metal salts were used to optimize the separation process. Best Salting-out effect was obtained by KCl which extracted up to 90% of platinum utilizing TOPO. Furthermore, ex...
Conference Paper
Full-text available
Data on liquid-liquid extraction of platinum from commercial spent catalysts by trioctylphosphine oxide (TOPO) in toluene are presented. Alkaline metal salts were used to optimize the separation process. Best Salting-out effect was obtained by KCl which upto 90% of platinum extracted by TOPO. In the present study, extraction percentages of Pt and A...
Article
In this paper, an analytical solution for the nonlinear free vibration of a conservative oscillator is presented. The nonlinear governing equation is solved by employing the Variational Iteration Method (VIM). This method is based on the use of Lagrange multipliers for identification of optimal values of parameters in a function. Obtained results r...
Article
Full-text available
In this paper, an axial dispersion mathematical model is developed to simulate a three-phase slurry bubble column reactor for direct synthesis of dimethyl ether (DME) from syngas. This large-scale reactor is modeled using mass and energy balances, catalyst sedimentation and single-bubble as well as two-bubbles class flow hydrodynamics. A comparison...