Z. Mansoori

Z. Mansoori
Amirkabir University of Technology | TUS · ERC

Ph.D. Mechanical Engineering

About

64
Publications
11,935
Reads
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879
Citations
Citations since 2017
21 Research Items
611 Citations
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
Additional affiliations
January 2003 - June 2021
Amirkabir University of Technology
Position
  • Professor

Publications

Publications (64)
Conference Paper
The prediction of frictional pressure loss in many oil wells drillings is of the utmost importance. Most studies in this area are concerned with fluid flow in pipes and annulus to predict friction losses. However, studies on the tool-joint effect in frictional pressure estimations were limited to only a few experimental and theoretical studies on w...
Conference Paper
In the oil and gas industry, sand particle erosion damage to elbows is a common problem. The ability to predict erosion patterns is of great importance for sizing lines, analyzing failures, and limiting production rates. Computational fluid dynamics (CFD) can be utilized to study the erosion behavior and mitigate the erosion problem for safety purp...
Conference Paper
The prediction of frictional pressure loss in many oil wells drillings is of the utmost importance. Most studies in this area concerned fluid flow in pipes and annulus in order to predict friction losses. However, studies on the tool-joint effect in frictional pressure estimations were limited to only a few experimental and theoretical studies on w...
Article
Present work studies the impact of surface structure on the heat transfer and liquid-vapor interface properties of condensation flow formed inside rough nanochannels compared to the smooth ones, using molecular dynamics simulation. Considering rectangular roughness configuration on the walls of nanochannel, simulations are performed under various s...
Article
A comparison between the efficacy of surface boundary structure and presence of nanoparticles on the condensation two-phase flow inside rough nanochannels has been accomplished by applying molecular dynamics procedure to evaluate the thermal conductivity and flow characteristics. Simulation is performed in a computational region with two copper wal...
Conference Paper
In many industrial applications, gas-liquid-particle three-phase flows are observed. Predicting erosion damage in this type of flow is a challenging issue, and so many factors, such as the liquid film behavior have significant effects on the erosion rate. In the present study, the Eulerian-Lagrangian approach was implemented to study the process of...
Article
In this paper, the annular condensation of vapor Argon through a nanochannel is studied using the molecular dynamics method. Simulation is performed in a computational domain with two solid platinum walls for different saturation conditions with focusing on the flow characteristics and heat transfer. The density, surface tension, and velocity profi...
Article
Sand erosion occurs in a host of industrial applications and accounts for one of the key factors in equipment failure. This study investigated sand particle erosion performance of different 90-degree fittings. To this end, a CFD-DEM model was employed and the erosion rates of various fittings carrying particle-laden flows were analyzed. Several cas...
Article
A numerical study is performed to investigate the effects of an external uniform and non-uniform magnetic field on the optimal geometric design and thermal performance of a microchannel heat sink. Fe3O4 nanoparticles suspended in water is used as the cooling fluid. The optimization process has been utilized for three cases: (1) in the absence of th...
Article
In this paper, the effect of nanoparticles on the annular condensation flow of Argon-Copper nanofluid passing inside a nanochannel is investigated by molecular dynamic method. Simulation is performed in a computational domain with two solid Copper walls for different saturation conditions with focusing on the thermal conductivity and flow character...
Article
In the oil and gas industry, predicting sand particle erosion damage is a challenging task as many factors have profound effects on the material losses. In this study, a computational modeling approach was used, and the sand erosion in gas-liquid-solid annular three-phase flows in pipe bends was analyzed. The Volume of Fluid (VOF) and the hybrid Eu...
Article
Colloidal Gas Aphron drilling fluid is colloidal dispersions of gas microbubbles, which are designed to reduce the loss of circulation in depleted reservoirs. This fluid creates a robust and elastic micro-bubble network, to block the pores of the formation and minimize filtration loss. In this study, Xanthan Gum (XG) polymer and Sodium Dodecyl Benz...
Article
In this study, the effect of copper nanoparticles on the interface properties of liquid–vapor argon is investigated by molecular dynamics simulation. Stoddard Ford potential function has been utilized to estimate the interactions of argon–argon and argon–copper particles. Simulation is done in the nanoscale computational domain to phase change of v...
Conference Paper
Fracking (fracturing) is of great importance for enhancing oil and gas production from low permeability reservoirs. Since in fracking fluid, suspension of sand particles are used, the erosion failure of fracturing equipment has become an increasing concern. Accordingly, investigation of erosion of commonly used fittings such as ball seats in order...
Article
In many industrial applications, sand erosion wear is the main cause of equipment failure, particularly in the transferring pipeline fittings. In order to reduce the adverse consequences of erosion in bends, in this study the potential usage of plugged tees instead of standard elbows under a wide range of flow conditions is examined. A computationa...
Article
Full-text available
Today, the drilling operators use the Colloidal Gas Aphron (CGA) fluids as a part of drilling fluids in their operations to reduce formation damages in low-pressure, mature or depleted reservoirs. In this paper, a Taguchi design of experiment (DOE) has been designed to analyse the effect of salinity, polymer and surfactant types and concentration o...
Article
Laminar forced convection heat transfer from a constant temperature tube wrapped fully or partially by a metal porous layer and subjected to a uniform air cross-flow is studied numerically. The main aim of this study is to consider the thermal performance of some innovative arrangements in which only certain parts of the tube are covered by metal f...
Article
Full-text available
In gas and oil industry, erosion damage to pipelines' bends and elbows due to the presence of sand particles has been a challenging issue. In this study, a computational model approach was used to evaluate the erosion rates at different vertical return bends: Sharp bend, standard elbow, 180° pipe bend, and long elbow. The airow in the pipe was simu...
Article
Full-text available
Since curved pipes are widely used in industrial equipment, predicting multiphase ows in these geometries is of great importance. In the present study, a computational model for predicting the velocity profile is developed and used to study the developing turbulent gas-liquid ows in curved pipes. In order to discretize and solve the three-dimension...
Conference Paper
Sand particle erosion is the main cause of the failure of bends in the natural gas pipelines. The rapid progress of computational power and modern numerical methods has provided the opportunity for developing realistic simulation of the erosion process. The goal of this paper is to predict the sand erosion rates with the use of computational fluid...
Conference Paper
In the present paper, a numerical study has been conducted to investigate the heat transfer from a constant temperature cylinder covered with metal foam. The cylinder is placed horizontally and is subjected to a constant mean cross-flow in turbulent regime. The Reynolds Averaged Navier-Stokes (RANS) and Darcy-Brinkman-Forchheimer equations are comb...
Article
We offer a general procedure to design and select a CHP unit based on an internal combustion engine. This work is devoted to provide a numerical model to estimate the amount of generated power and recovered heat, based on the engine performance features. We evaluated the mismatch of our numerical results and the available computational published va...
Conference Paper
Predicting the nature of simultaneous flows of gas and liquid in curved pipes is of crucial interest to gas and oil industry. In this paper, laminar gas-liquid flows in curved pipe were studied and a computational model for predicting the velocity profile and pressure gradient was developed. The three-dimensional steady-state momentum equations wer...
Article
Chemical looping is an attractive technology which can produce three pure streams of N2, H2 and CO2. In this paper, for the first time, a novel and green plant configuration is proposed for urea production in which chemical looping process is used as primary stage to prepare feedstock of urea synthesis unit. The proposed plant is intended by reduct...
Article
In microfluidics, two important factors responsible for the differences between the characteristics of the flow and heat transfer in microchannels and conventional channels are rarefaction and surface roughness which are studied in the present work. An incompressible gas flow in a microchannel is simulated two dimensionally using the lattice Boltzm...
Article
Heat transfer in two-phase flow boiling of a dilute mixture of TiO2 nanoparticles in R141b base fluid in a smooth tube is investigated experimentally. Examining the obtained results reveals that enhancement of the convective heat transfer coefficient for the particle volume fractions of 0.01% and 0.03% in comparison with pure R141b is more pronounc...
Article
In the present study, the effects of wall roughness on erosion rate for gas–solid flows in horizontal annular pipes for different ratios of inner to outer radii and also for different values of solid particle concentration are investigated. The results are compared with earlier studies, and the effect of various parameters is discussed. The impinge...
Article
Full-text available
Gas–solid flow in a pipe with different configurations (vertical, horizontal, and inclined positions) is studied experimentally. Air with temperature around 170°C and sand particles with mean diameter of 253 μm are used as gas and solid mediums, respectively. Effects of different parameters (pipe slope and solid particles feed rate) are studied on...
Article
A modified model for prediction of erosion rate in pipe flows is presented based on the simulation of the fluid fluctuating velocities with the Discrete Random Walk model. Turbulence modulation of gas-solid flow in a horizontal pipe is investigated numerically using a four-way coupled Eulerian-Lagrangian approach. The particle impingement angle and...
Article
The effects of wall surface roughness on the rate of heat transfer and temperature profiles in turbulent gas-solid flows in pipes at different inclination angles were studied. The earlier developed computational model for 3D flows including the four-way interactions was extended and used in this study for evaluating the mean flow, turbulence intens...
Article
The effect of presence of solid particles on stratified wavy gas-liquid flows has been studied. The height of liquid phase in the natural gas pipeline is a key parameter in designing and can affect the corrosion/erosion rate. In present paper, the numerical four-way simulation of solid particles in gas-liquid wavy stratified flow has been used. The...
Article
In order to simulate the performance of pure methane in chemical looping using iron-based oxygen carrier, simultaneously production of three pure streams of hydrogen, nitrogen and carbon dioxide has been investigated. For this purpose, proper operating conditions have been discussed for maximum production of hydrogen, complete consumption of oxygen...
Article
Production of three pure streams of H2,N2and CO2makes the chemical looping reactors asan attractive intermediate technology to provide the feedstock of ammonia synthesis loop. As a goal of paper, for the first time, a novel and green plant configuration using three chemical looping reactors is proposed for ammonia production in which needed hydroge...
Article
Full-text available
The thermal characteristics of hollow polyester fibers were compared with solid polyester fibers in order to study their processing behavior and performance characteristics. The effects of different processing and structural properties including fiber diameter, bulk density of layer, and surface pressure on layers of needle-punched nonwoven fabrics...
Article
As a result of the worldwide concern about global warming, projects that target reduction of greenhouse gas emissions have gained a lot of interest. The idea of this paper is to recover exhaust hot gases of an existing gas turbine power plant to meet dynamic thermal energy requirements of a residential area (the new town of Parand) situated in the...
Article
The thermodynamic and thermoeconomic analyses are investigated to achieve the optimum operating parameters of a dual pressure heat recovery steam generator (HRSG), coupled with a heavy duty gas turbine. In this regard, the thermodynamic objective function including the exergy waste and the exergy destruction, is defined in such a way to find the op...
Article
The employment of a TES system to improve the performance of a DH network integrated with a CHP station is investigated. Thermal energy demand fluctuations is the main issue threatening the viability of CHP/DH projects; therefore, TES facility can be coupled with CHP plant by a smart operation strategy to match the production and consumption profil...
Article
Trigeneration, referred to as Combined Heating, Cooling and Power (CHCP), is an efficient energy conversion technology which offers several merits, including fuel consumption saving, CO2 emission abatement and reduced expenses. In this article, the viability of trigeneration system in Mashad city, the main tourist destination in Iran, has been stud...
Article
Full-text available
A turbulent liquid-solid suspension upward flow in a vertical pipe is simulated numerically using the Eulerian-Lagrangian approach. Particle-particle and particle-wall collisions are simulated based on the deterministic approach. The model considers the thermal turbulent field characteristics and includes kθ-τθ equation model, in addition to the k-...
Article
Multiphase flow in petroleum transfer lines with different flow patterns considering the variation of pressure and temperature has been studied. The corrosion in carbon steel pipes is modeled and the optimum injection rate of inhibitor to control the corrosion rate is studied for different pipeline conditions. The flow pattern is recognized using t...
Conference Paper
Full-text available
Many biomedical applications, gas-solid flow in a pipe with local area constriction is laminar and depends upon the inlet flow rate and pipe geometry. In mini and micro scale flows, the characteristic dimensions of the flow conduits are comparable to the mean-free-path of the gas media. Under such conditions the "continuum hypothesis" break-downs....
Article
New thermal stochastic particle collision model in gas–solid flow in a riser is developed. The simulation is based on four-way coupling of phases considering inter-particle collision and heat transfer. It is shown that the limitation of excessive computational time in Eulerian–Lagrangian simulation of gas–solid flows for the high loading ratios is...
Article
Dispersion and separation of fiber bundles into individual fibers, requires exposing them to a shear stress field to overcome inter-fiber frictional forces. To this end, fiber-mixing tanks are usually used to enhance shear and agitation in water and help the dispersion process. The required time and necessary agitation to separate and disperse fibe...
Conference Paper
Two-dimensional simulation of turbulent solid-liquid flow is carried out. The modeling is established for a two-phase flow of solid particles in a vertical pipe water flow. Governing equations of flow and turbulence field are solved in an Eulerian-Lagrangian approach by the use of k-τ (turbulence time scale) model and trajectories of the particles...
Conference Paper
Three-dimensional simulation of turbulent gas-solid flow with heat transfer for a vertical pipe is performed in this study and the results are presented. The approach is based on an Eulerian/Lagrangian four-way interaction formulation considering turbulent hydrodynamic and thermal intensities and time scales equations. Inter-particles and particle-...
Conference Paper
A numerical model for solving a fully developed, turbulent, smooth stratified two-phase gas-liquid flow in pipeline is developed. This model is capable to determine pressure drop and liquid height. In addition wall and interfacial shear stress, flow field and temperature field for both phases could be predicted successfully. The method solves the t...
Article
Full-text available
Modeling of turbulent two-phase flows heat transfer, besides being of scientific interest, is of considerable practical importance in many industrial processes. For example, the rate of Nitrogen Oxide formation in a combustor with the same average temperature field depends on the temperature fluctuation. Dispersion of thermal pollutant in atmospher...
Conference Paper
Full-text available
This research is concerned with the energy and exergy analysis of drying process of paper. Analyses are mostly concentrated on efficiency variations caused by alteration of temperature and velocity of drying air. Drying experiments were conducted at inlet temperatures of 90°C and 150°C, and at drying air velocities of 1.4m/s and 0.5m/s in the conve...
Article
A turbulent gas–solid suspension upward flow in a vertical pipe is simulated numerically using Eulerian–Lagrangian approach. Particle–particle and particle–wall collisions are simulated based on deterministic approach. The influence of particle collisions on the particle concentration, mean temperature and fluctuating velocities are investigated. N...
Conference Paper
Traditional gas-solid turbulence models using constant or the single-phase gas turbulent Prandtl number cause error in the thermal eddy diffusivity and thermal turbulent intensity fields calculation. The thermo-mechanical turbulence model is based on solving the hydrodynamic transport equations of the turbulent kinetic energy and turbulent time sca...
Article
A new dynamic and thermal turbulent Gas- solid flow simulation is introduced.Gas- solid flow simulation by the new dynamic and thermal turbulent time scale transport model (k-τ,k_{θ}-τ_{θ}) shows the advantage of calculating the turbulent Prandtl number directly from the turbulent field calculations. Also, this model eliminates the difficulties of...
Article
Effects of the particle–particle heat transfer in a gas–solid turbulent flow in a riser were evaluated. An Eulerian/Lagrangian four-way interaction formulation including the particle collisions in conjunction with the k − τ and the kθ − τθ model equations were used in the numerical simulation. Inter-particles and particle–wall interactions were acc...
Article
Full-text available
Thermal interaction between a turbulent vertical gas flow and particles injected at two different temperatures is investigated experimentally and numerically. Two-phase k–τ and kθ–τθ numerical model in four-way simulation is used in a Lagrangian–Eulerian framework. In agreement with the numerical results, the experiments show that addition of hot p...
Article
A thermo-mechanical turbulence model is developed and used for predicting heat transfer in a gas–solid flow through a vertical pipe with constant wall heat flux. The new four-way interaction model makes use of the thermal kθ–τθ equations, in addition to the hydrodynamic k–τ transport, and accounts for the particle–particle and particle–wall collisi...
Article
The turbulent heat transfer in a vertical upward gas–solid flow is studied. The new model uses the two-way interaction of two-phase flows and an Eulerian/Lagrangian approach. The model considers the thermal turbulent field characteristics and includes kθ–τθ equation model, in addition to the k–τ model for two-phase flow. Numerical model validation...

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