Sachin Shaw

Botswana International University of Science and Technology | BIUST · Department of Mathematics and Statistical Sciences

The interfacial nanolayer is a tinny coating of liquid molecules convened around the immersed solid nanoparticles in the base liquid which plays a vital role to control the flow and improve the thermophysical properties of the fluid. Features are more prominent for hybrid nanomaterials. Hence, the present analysis deals with the concomitant effects...

The interfacial nanolayer is a tinny coating of liquid molecules convened around the immersed solid nanoparticles in the base liquid, and it promises a vibrant role in improving and controlling the thermal properties of the nanoparticles and flow features when embedded in the base fluid. Hence, the current study features the consequence of interfac...

Because of accelerated demands of advanced technologies like power station, chemical production and microelectronics, it necessitates the need of novel type of fluids with more heat transfer capability. Due to synergistic effect, ternary composite nanofluids (TCNFs) ensure better thermophysical and Rheology properties thereby acting as better suita...

In this work, the main focus is to analyze the transport of solute in non-Newtonian Casson fluid flow in a channel with suction/injection effects in the presence transverse magnetic field. The impact of Navier’s slip and boundary absorption effects are also examined for some practical utility of the proposed problem. At the beginning, the non-dimen...

Nanofluids have been used in industries due to their high heat transfer rate. The prominence is on hybrid nanomaterials as they improve more thermal conductivity of the fluids and liquid alloys. In this problem, a thermal Marangoni convection flow of nanomaterials MWCNT and MoS2 embedded in base fluid water on steady Darcy-Forchheimer flow with the...

The study highlights a rising number of fluids such as nanofluids that encountered in daily life exhibit non-Newtonian behavior and it is exploited in manufacture due to their high heat transfer rate becoming more and more important as time goes on. Brownian motion provided by the bombardment of fluid particles from the surrounding medium. In this...

Irreversibility analysis gives an idea of the energy loss of the system which appears in most industrial applications. In the present problem, the irreversibility of a 3-D Darcy–Forchheimer Casson hybrid nanofluid flow caused by a rotating disk is analyzed. Cattaneo–Christov heat flux, Joule’s heating, and nonlinear thermal radiation with heat gene...

In this study, the Darcy or non-Darcy stagnation point flow and thermal analysis of ternary composite nanofluids with modest Prandtl numbers across stretched surfaces that are susceptible to slip or no-slip environments are examined. The concept of non-linear thermal radiation is brought into play. It has been decided to apply non-linear slip. Homo...

The graphene oxide–molybdenum disulfide (GO–MoS2) exhibited the performance of photocatalytics under solar light radiation and the problem is more significant during Marangoni convection. In this scenario, the thermosolutal Marangoni stagnation point flow over a stretching sheet where the GO–MoS2 nanoparticles are embedded in a base fluid water are...

Bödewadt flow and heat transfer characteristics of radiative and dissipative ternary composite nanomaterial over a stretched rotating disk is investigated. Flow is subjected to second order boundary slip. Entropy optimization due to radially stretched flow of ternary composite nanomaterial is executed. The main purpose of this novel study is to inv...

ENTROPY ANALYSIS OF 2D MHD CASSON FLUID WITH THE INFLUENCE OF ACTIVATION ENERGY AND CHEMICAL REACTION OVER NON-LINIER EXPONENTIAL STRETCHING SURFACE Abstract:- In the current article, investigations are considered under the influence of activation energy and chemical reactions of Casson nano fluid flow over an exponential stretching surface in the...

MATHEMATICAL MODEL AND SIMULATION OF MODIFIED SIRD MODEL ON COVID-19 OUTBREAK IN INDIA Abstract:-A worldwide unexpected explosion is created by COVID-19 and which gives a great challenges for health and economic conditions. It is energizing globally one of the biggest problem, even after Government has taken a proactive still growth of COVID-19 is...

IMPACT OF ACTIVATION ENERGY AND CHEMICAL REACTION ON THE CASSON FLUID FLOW OVER AN EXPONENTIAL STRETCHING SURFACE Abstract:-In the current article, investigations are considered under the influence of activation energy and chemical reactions of Casson nano fluid flow over an exponential stretching surface in the presence of porous media. All the pa...

Solute dispersion is a significant phenomenon during drug targeting to estimate the accumulation of drug particles at the tumour region with the capture efficiency. In this present study, we aim to predict the effective dispersion and saturated concentration of drug carriers during the magnetic drug targeting in the microvessel with a time fraction...

The present analysis deals with the hydrothermal and stagnation point flow of non-Newtonian fluid characterized by Carreau model over a moving thin needle. Darcy-Forchheimer medium is introduced. Homogeneous and heterogeneous chemical reactions are involved in the flow model. Non-linear Navier's slip condition is taken into account. Buongiorno mode...

Background and Objective Due to the low toxicity, unique physiochemical properties, and appropriate surface modifications, Carbon Nanotubes (CNTs) are used as target carriers in drug delivery systems. In the present problem, we have considered both single-walled and multi-walled CNTs to study the impact of irreversibility on the micropolar nanoflui...

The utilisation of nano-fluids is of pronounced importance in industries. GO-MoS2 nanocomposite exhibits significant photocatalyst performance and is applied in water remediation and energy storage. In this problem, we have analysed a three-dimensional GO−MoS2/ Casson hybrid nanofluid flow between two parallel plates in the magnetic field, nonlinea...

The goal of the present investigation is to explore the flow and thermal behavior of non-Newtonian fluid with single-walled carbon nanotube (SWCNT)/multi-walled carbon nanotube (MWCNT) suspensions over a shrunk rotating disk subject to Darcy-Forchheimer effect. The mechanisms of suction, viscous dissipation and thermal radiation have been implement...

Heat transfer from a surface enshrouded in a porous medium through which non-Newtonian hybrid nanofluid is flowing is of great practical importance in several fields of engineering. Cross fluid model is implemented due to its significant properties like yield stress features, flow in regions of both low and high shear rates, finite viscosity and ti...

The present study analyzes the boundary layer flow behavior of single‐walled Titania nanotube (SWTNT)–water nanofluid over a rotating disk. The main motivation behind such an investigation is that single‐walled Titania nanotubes (SWTNTs) exhibit significant results due to their extensive applications, low cost, high thermal conductivity, dielectric...

The main goal of this article is to examine the influence of shape factors, Wu’s slip, non-uniform heat source/sink on the radiative up and down hydromagnetic flow of SWCNT/MWCNT-water nanofluid past moving thin vertical needle. Entropy optimization analysis is carried out. Brick, Cylinder, Platelet and Blade shapes of nanoparticles are considered....

Background and objective Biomolecules of microorganisms are of greater importance in the industrial microbiology because, biosurfactants and surface-active molecules are produced by mircro-organisms. Biosurfactants are used in the fields of enhanced oil recovery and various environmental bioremediation. The combined influence of nanofluids and micr...

This study explores the entropy generation analysis on unsteady nonlinear radiative ethylene glycol‐based Casson nanofluid flow near stagnation point towards a stretching sheet through a porous medium. Analysis has been accomplished in the presence of an inclined magnetic field, heat generation, homogeneous–heterogeneous reactions, and viscous diss...

The impressive high thermal conductivity and low weight allow the carbon nanotubes (CNTs) to improve heat dissipation and cooling. In the present problem, we aim to analyze the CNTs embedded micropolar nanofluid flow between two parallel stretching sheets with the base fluid ethylene glycol (EG) which is effectively used as antifreeze and coolant....

This review analyzed the results of slip velocity, thermal radiation, and MHD effects considered near the stagnation point flow over the stretching surface. The heat source parameter and chemical reaction parameter are added in temperature and concentrations equations. The convective heat and mass transfer are adopted in the boundary conditions. Th...

Lassa fever is a fatal zoonotic hemorrhagic disease caused by Lassa virus carried by multimammate rats, which are widely spread in West Africa. In this work, a fractional-order model for Lassa fever transmission dynamics is developed and analysed. The model involves transmissions from rodents-to-human, person-to-person, as well as from Lassa virus...

In this study, the investigations of the non-Newtonian fluid and heat transfer is considered as an exponentially stretching surface in the occurrence of porous magnetic field due to its diversified applications in medical and engineering disciplines.The behavior of non-Newtonian fluid has been characterized as Casson fluid model.The major parame...

The goal of the present article is to investigate the three dimensional electromagnetic flow and heat transfer behavior of Casson nanofluids with suspension of SWCNT/MWCNT nanomaterials due to shrinking rotating disk. Introduction of Revised Hamilton’s Crosser model revealing the interfacial nanolayer and shape effects is the novelty of the present...

In most industrial processes it is of paramount importance to control the heat and mass transfer rates to ensure high-quality products. Several techniques including the use of nanofluids in place of ordinary fluids and in some cases motile microorganisms are some of the recent applications in this endeavour. In some recent studies of bioconvection...

Background and Objective In the drug targeting delivery, the mesoporous materials known as biomaterials exhibit a more significant drug loading and drug release capacity at a specific location are controlled by the external magnetic field. This article theoretically investigates the effects of a high specific surface, pore volume and unique pore si...

EFFECT OF SOLAR THERMAL RADIATION AND MAGNETIC FIELD ON THE FLOW OF CASSON FLUID Abstract In this paper, the behavior of the non-Newtonian fluid and heat transfer is considered in an exponentially stretching surface in the occurrence of porous magnetic field, as it has vast applications in the field of several industries. An explicit Finite diff...

The steady hydromagnetic flow and heat transfer behavior of non-Newtonian (Cross) hybrid nanofluid with water as base fluid and SWCNT, and MWCNT as nanoparticles past a stretched cylinder has been analyzed. Dissipative medium characterized by fluid friction and Ohmic heating is considered. The linear, non linear and quadratic radiations of non Newt...

The heat and mass transport with Arrhenius activation energy has countless uses such as in nuclear reactors, the synthesis of chemical compounds, geothermal artificial lakes, and retrieval of thermal lubricants. The focus of this work is the analysis of Arrhenius activation energy and binary chemical reaction in a stagnation point Casson nanofluid...

This article examines the influence of single-walled carbon nanotube (SWCNT)/multi-walled carbon nanotube (MWCNT) nanoparticles shapes on the radiative up and down flow of nanofluids past a thin needle. This nanofluid flow is considered in the presence of Darcy-Forchheimer effects, thermal radiation, Wu's slip, and non-uniform heat source/sink. Bri...

In the present study, flow of Diamond-Co3O4/ethylene glycol (EG) hybrid nanofluid towards a stretching sheet with stagnation point has been analysed under the influence of magnetic field and nonlinear thermal radiation. The catalytic property of homogeneous–heterogeneous reactions has also been included in the system. Additionally, the entropy gene...

Application of the nanoparticles with different non-Newtonian base fluid has huge application in the industries where the heat generation or energy transform takes place and many such applications are designing the advanced energy system at high temperature, aerodynamics, energy extraction etc. In the present study, we have analyzed irreversibility...

The goal of the current work is to explore the influence of Thompson and Troian slip on the hydromagnetic microrotations of Carreau nanomaterials over a linearly stretched surface subject to NLTR, viscous dissipation, Newtonian heating, homogenous and heterogeneous reactions. Effect of non linear slip (Thompson and Troian slip) on non Newtonian nan...

Nanoparticle-based drug targeting is an important platform for the treatment of cardiovascular disorders. Magnetic drug targeting is more significant as it is a noninvasive procedure and biocompatible. The present problem aims to understand magnetic drug delivery to a specific location in a permeable blood vessel under the vibration and magnetic en...

Bio-convection is an important phenomenon which is described by hydrodynamic instability and pattern in suspension of biased swimming microorganisms. This hydrodynamics instability arises due to the coupling force between the motion of the micoorganisms and fluid flow. It becomes more significant when nanoparticles are immersed in the base fluid wi...

This paper aims at investigating the variable viscosity, shape, and interfacial layer effects on entropy‐optimized assisting/opposing/forced convection flow of single‐walled carbon nanotube (SWCNT)/multi‐walled carbon nanotube (MWCNT) nanofluids past a thin needle. The nanoparticles such as SWCNT/MWCNT are used to enhance the heat transfer rate (HT...

Purpose The purpose of this study is to investigate the Cattaneo-Christov double diffusion, multiple slips and Darcy-Forchheimer’s effects on entropy optimized and thermally radiative flow, thermal and mass transport of hybrid nanoliquids past stretched cylinder subject to viscous dissipation and Arrhenius activation energy. Design/methodology/app...

An analysis is built up for the exploration of radiative heat transport on the magnetohydrodynamic flow of rotating fluid over a vertical sheet. The inclusion of thermal radiation in conjunction with the reacting species enhances the energy as well as the solutal profiles respectively. In an advance, external heat source and applied magnetic field...

In this analysis, the interfacial layer and shape effects has been inspected numerically for the Darcy Forchheimer electromagnetic flow of single-walled carbon nanotubes (SWCNT) and multi-walled carbon nanotubes (MWCNTs) with base fluid (water) nanofluids. The influence of nonlinear thermal radiation and homogenous and heterogeneous chemical reacti...

The current study intended to discuss a comparative study on the three dimensional Casson nanofluid with nonlinear radiative MHD flow and heat transfer aspects between two parallel stretching/shrinking surfaces. The mathematical models for momentum and temperature are established by employing the boundary layer flow of fluids with spinel-type ferri...

A model on magnetic drug targeting is developed to determine the capture conditions on the efficient dispersion of drug-coated nanoparticles in a tumor environment. These particles consist of a non-magnetic core material containing embedded magnetic nanoparticles and a therapeutic agent (such as a photodynamic sensitizer). In the present problem, w...

Immunotherapy plays a vital role in strengthening the immune system and enhancing its ability to fight cancer during the tumor-immune interaction. This interaction is a complex process and biological studies are still ongoing to explore the tumor microenvironment with the action of the immune system. The limitations associated with ethical consider...

The main purpose of this investigation is to analyze the flow and heat transfer behavior of a non Newtonian fluid (Oldroyd B fluid) with hybrid nanostructure subject to externally inclined magnetic field. Cattaneo Christov heat flux model is incorporated in the energy equation. Non linear thermal radiation and viscous dissipation mechanisms are con...

Nanoparticle (drug particle) dispersion is an important phenomenon during nanodrug delivery in the bloodstream by using multifunctional carrier particles. The aim of this study is to understand the dispersion of drug particle (nanoparticle) transport during steady blood flow through a microvessel. A two-phase fluid model is considered to define blo...

The flow of ferronanofluid due to a rotating disk finds its significant place in biomedical sciences, pharmaceuticals, electronics, aerodynamics etc. Entropy generation appears in the systems/processes where its minimization is needed because it prohibits the decay of available energy which in turn boosts the efficiency of the associated thermal sy...

An analysis is performed to studied the 3D MHD flow of Al2O3–Cu/Water (H2O)–Ethylene glycol (C2H6O2) (50–50% volume) hybrid nanofluid between two rotating stretching disks. Thermal equation is constructed of Cattaneo–Christov heat flux model with the thermal radiation, heat generation, and viscous dissipation. Using the proper similarity transforma...

The current study deals with the effects of Newtonian cooling, magnetic field, and nonlinear radiation on the flow of a Jeffrey fluid along with thermal dispersion and homogeneous‐heterogeneous reaction towards a stagnation point. The developed governing equations are transformed into nondimensional equations employing suitable similarity transform...

We examine the capturing efficiency of magnetic nanoparticles bound with drug molecules infused into the blood stream and monitored them by the application of an external magnetic field. We analyzed the motion of the nanoparticles along with the blood velocity through a porous medium vessel under the effect of periodic vibration. The thermo-solutal...

The present article has been groomed to explore the boundary-driven magnetized flow of cross nanoliquid over thin needle subject to auto catalysis chemical reactions. In addition to it, the effect of entropy optimization model is incorporated and transportation of heat under non-uniform heat source/sink, Cattaneo-Christov heat flux (rectified Fouri...

Solutal dispersion phenomena are associated with the nanoparticle-based drug delivery in the cardiovascular system to cure cardiovascular disorder. In the present problem, we explored the solutal transport for an unsteady blood flow through a microvessel with wall absorption. The rheology of blood is characterized by a two-fluid model similar to th...

Micropolar fluids had many industrial applications such as polymer solutions, lubricant fluids, and biological structures. However, the present study deals with the drug delivery in the cardiovascular system where the blood particles are considered as microparticles included their self-rotation (mainly red blood cells) and interaction. The nanopart...

Graphene oxide nanofluid is distinguished from other nanofluids due to its easy synthesis, longer suspension stability, higher thermal conductivity, lower erosion, corrosion, larger surface area and lower demand for pumping power‐favorable to some need of the industrial world. Entropy generation minimization is the best methodology to augment the r...

Role of endothelium glycocalyx integraty is important for targeted intravenous nanoparticle drug delivery. It plays a vital role in many physical functions in microvessel including protection of the vessel wall with harmful levels of fluid shear. Hence, understanding the impact of the glycocalyx layer is important to develop of human medicine for t...

Microorganism cells movement in fluid is universal and affects many ecological and biological processes, including infection, reproduction and marine life ecosystem. There are many biological and medical applications that require understanding of transport process in nanofluids containing suspension of microorganism. The present problem deals with...

Ferrofluids are made out of nanoscale ferromagnetic particles and known as colloidal liquids suspended on a bearer liquid, normally water (H2O) or an organic solvent like kerosene. Ferrofluid is utilized in rotary seals, computer hard drives, loudspeakers, magnetic resonance imaging, and so forth. The present article reveals the extent of effective...

We examine the effect of the Caputo-Fabrizio derivative of fractional-order model on the flow of blood in a porous tube having thermochemical properties under the magnetic and vibration mode. Blood is considered as the biviscosity non-Newtonian fluid having thermal radiation and chemical reaction properties to observe its impact on energy flux and...

Background Characterised with augmented heat transport and thermal efficiency, nanofluids are implementable in diversified applications include pharmaceutical industries, hybrid-powered machines, cooling of different appliances, refrigerator, microelectronic, heat exchanger etc. Taking such advantages into mind, physical aspects of entropy optimiza...

The objective of the present study is to investigate the effects of the variable magnetic field, chemical reaction, thermal radiation, Soret effect, and variable heat absorption on the fluid flow and heat and mass transfer of an unsteady Casson fluid past a stretching surface in a saturated porous medium. Velocity slip near the plate and conjugate...

Microorganisms play a vital role in understanding the ecological system. The motions of micororganisms are self‐propelled while the impact of thermophoresis and Brownian motion property of nanoparticle shows more challenges in biotechnological and medical applications. The present problem is based on the understanding of double‐dispensed bioconvect...

The present article candidly states the incremental impact of nonlinear thermal radiation on heat transfer enhancement due to Darcy–Forchheimer flow of spinel-type MnFe2O4-Casson/water nanofluids due to a stretched rotating disk. In present contest, the entropy generation approach is highlighted specially as a powerful tool for the analysis of the...

In the present paper, we have discussed the thermosolutal Marangoni force acting on the electrically conducting Casson fluid flow over a permeable horizontal stretching surface. It is presumed that the condition at the interfaces is influenced by the surface tension, which is proportional to the temperature and concentration profiles. At the interf...

In the present study, we investigate the velocity, thermal, solutal, and motile micro‐organism (MM) slip effects on the flow of chemically reactive Casson nanofluid flowing over an exponentially stretched electromagnetic sheet in the presence of a chemical reaction. In addition, a mechanism of improving the motion of nanoparticles (Brownian motion...

In this article we propose a fractional order time derivative model on blood flow, heat and mass transfer through an arterial segment having interaction with magnetic field in the presence of thermal radiation and body acceleration. The study focuses on the unidirectional blood flow through porous medium vessel by treating non-Newtonian Casson flui...

We study heat and mass transfer on the flow of an electrically conducting, incompressible Casson nanofluid over the accelerated stretching plate in the presence of a magnetic field. We consider the nanofluid, which incorporates the flow effects of Brownian motion and thermophoresis. In addition, we take the convective boundary condition, slip param...

The double diffusion convection Casson fluid flow along a vertical plate incorporating Soret effect and viscous heating with thermal and solutal dispersion was studied. A well-known system of non-similar partial differential equations was solved using the bivariate local linearization method (BLLM). The solution procedure uses an approximation by a...

This study deals with the transfer of mass and heat of nanofluid flow over three different geometries of the non‐Darcy permeable vertical cone/wedge/vertical plate. Influence of the Brownian motion and thermophoresis takes place due to the nanofluid. Boundary condition on the temperature is introduced at the surface where the thermal conductivity o...

Data‐mining techniques play an important role in hyperparameter optimization of heterogeneous environmental factors and their relative contribution as determinants of incidences in insect pest ecological studies. A multidimensional field‐based surveillance was conducted in two seasons (24 months), July–June of each season (2015/2016 ‐ season 1 and...

This paper carries on investigation to study the effects of variable magnetic field and thermal radiation on free convective flow of an electrically conducting incompressible nanofluid over an exponential stretching sheet. The model implemented in the present study significantly enriches the thermal conductivity and hence more heat transfer capabil...