Shan Ali Khan

Bio: Shan Ali Khan is an academic researcher from Government College University, Faisalabad. The author has contributed to research in topics: Nanofluid & Heat transfer. The author has an hindex of 6, co-authored 19 publications receiving 138 citations.

Significance of nonlinear thermal radiation in 3D Eyring–Powell nanofluid flow with Arrhenius activation energy

Abstract: In this paper, a mathematical analysis for three-dimensional Eyring–Powell nanofluid nonlinear thermal radiation with modified heat plus mass fluxes is investigated. To enhance the dynamical and physical study of structure, the slip condition is introduced. A Riga plate is employed for avoiding boundary-layer separation to diminish the friction and pressure drag of submarines. To evaluate the heat transfer, the Cattaneo–Christov heat flux model is implemented via appropriate transformation. A comparison between bvp4c results and shooting technique is made. Graphical and numerical illustrations are presented for prominent parameters.

Applications of modified Darcy law and nonlinear thermal radiation in bioconvection flow of micropolar nanofluid over an off centered rotating disk

Abstract: To improve the heat efficiency base fluids (water, engine oil, glycol), the interaction of nanoparticles (nanotubes, droplets, nanowires, metals and non-metals) into such traditional liquids is the most frequent mechanism and attained the researchers attention, especially in current decade. The nanofluid is a suspension of submerged solid particles in base fluids. The nano-materials convinced the applications in the field of nanotechnology, thermal engineering, industrial and bio-engineering. Following to such motivating applications in mind, current research reports the stagnation point flow of radiative micropolar nanofluid over an off centered rotating disk with applications of motile microorganisms. The novel dynamic of thermal radiation and activation energy are also incorporated. The appropriate transformations are utilized to reduce the partial differential equations into dimensionless forms. A numerical shooting scheme is used to obtain the approximate solution with MATLAB software. The effects of prominent parameter on velocity profile, nanofluid temperature, concentration of nanoparticles and microorganism profile are physically incorporated.

Numerical analysis of dual variable of conductivity in bioconvection flow of Carreau–Yasuda nanofluid containing gyrotactic motile microorganisms over a porous medium

Abstract: The increasing need of the modern era of technology for better ways to increase the heat transfer performance of thermal systems has made nanoliquids much more critical than they have been for the previous two decades. With such demand in mind, the Carreau-Yasuda nanofluid in the presence of motile microorganisms and thermal radiation along with Robin’s boundary conditions has been scrutinized. The controlling PDEs are cracked into ordinary differentials through suitable similarity transformation. The transformed ODEs are solved numerically utilizing bvp4c built-in MATLAB computational software. The graphical results of the main parameters against the velocity profile, temperature profile, and solutal field of nanoparticles and motile microorganisms' concentration are illustrated through graphs. Furthermore, the consequence of the involved parameters on the heat transfer rate is also deliberated and offered through table values. This study analyzed that velocity is a declining function of magnetic parameter and buoyancy ratio parameter. Besides, the additional amount of thermal radiation improves the heat transport rate. The concentration field is an escalating function of the thermophoresis parameter. Furthermore, microorganisms’ profile is boosted up by enlarging the magnitudes of microorganism’s Biot number.

A Novel Numerical Procedure for Simulating Steady MHD Convective Flows of Radiative Casson Fluids over a Horizontal Stretching Sheet with Irregular Geometry under the Combined Influence of Temperature-Dependent Viscosity and Thermal Conductivity

Abstract: A novel mathematical computing analysis for steady magnetohydrodynamic convective flows of radiative Casson fluids moving over a nonlinearly elongating elastic sheet with a nonuniform thickness is established successfully in this numerical exploration. Also, the significance of an externally applied magnetic field with space-dependent strength on the development of MHD convective flows of Casson viscoplastic fluids is evaluated thoroughly by including the momentous influence of linear thermal radiation along with the temperature-dependent viscosity and thermal conductivity effects. By combining the assumption of the low-inducing magnetic field with the boundary layer approximations, the governing partial differential equations monitoring the current flow model are transmuted accordingly into a set of nonlinear coupled ordinary differential equations by invoking appropriate similarity transformations. Moreover, these derived differential equations are resolved numerically by utilizing a new innovative GDQLLM algorithm integrating the local linearization technique with the generalized differential quadrature method. On the other hand, the behaviours of velocity and temperature fields are deliberated properly through various graphical illustrations and different sets of flow parameters. However, the accurate datasets generated for the skin friction coefficient and local Nusselt number are presented separately in tabular displays, whose physical insights are discussed comprehensively via the slope linear regression method (SLRM). As main results, it is demonstrated that the higher values of the Casson viscoplastic parameter reduce significantly the fluid velocity within the boundary layer region, while a partial reverse tendency is observed near the stretching sheet as long as the wall thickness parameter is increased. Besides the previously mentioned hydrodynamical features, it is also depicted that the thermal field throughout the medium is enhanced considerably with the elevating values of these parameters.

Swimming of Gyrotactic Microorganism in MHD Williamson nanofluid flow between rotating circular plates embedded in porous medium: Application of thermal energy storage

Abstract: Purpose : The presence of thermal energy storage devices in concentrated solar power plants is advantageous for controlling power and energy demand. The capacity of materials used in total thermal energy storage is thought to improve their performance. As a result, we investigate the unsteady flow confined by parallel rotating circular plates in a porous media filled with Williamson nanofluid in the current study. The importance of fluid flow over circular plates is owing to the variety of physical mechanisms they contain. Technically, such flows are important in lubrication, rotating machinery, crystal formation processes, and viscometry. Nanoparticles and motile gyrotactic microorganisms are included in the Williamson fluid model. The inclusion of an extrinsic magnetic field, which causes the production of an induced magnetic field between two circular plates, influences the flow. The impact of magnetic fields on lubrication drew attention because of the critical functions they play in a variety of industrial applications. For instance, the increased utilization of liquid metal lubricants in high-temperature bearings. Design/methodology/approach : A numerical methodology known as the differential transform method is used to solve nonlinear differential equations. Computational software is utilized to handle coupled nonlinear problems utilizing the proposed technique. The Pade approximation is also employed with the suggested technique to improve the convergence rate. Findings : The tabular and graphical approaches are used to discuss the simultaneous impact of various characteristics. On the axial and tangential velocity profiles, the rotational Reynold number shows a reverse trend. The magnetic field in both axial and tangential direction decreases as the magnetic Reynold number is increased. The effects of Prandtl number cause the temperature distribution to decline; similar occurrences are found at larger values of squeezed Reynolds number. Squeezing Reynolds number values increase nanoparticle concentration and motile microorganism profile. Brownian motion and thermophoresis parameters indicate opposing patterns for nanoparticle concentration. The motile microorganism profile is reduced when the Peclet number is increased, whereas the microorganism profile is increased when the bioconvection Schmidt number is increased. Originality/value : The acquired results for the proposed mathematical modeling with DTM-Pade are new to the literature and are reported here for the first time.

Swimming of Gyrotactic Microorganism in MHD Williamson nanofluid flow between rotating circular plates embedded in porous medium: Application of thermal energy storage

Abstract: : The presence of thermal energy storage devices in concentrated solar power plants is advantageous for controlling power and energy demand. The capacity of materials used in total thermal energy storage is thought to improve their performance. As a result, we investigate the unsteady flow confined by parallel rotating circular plates in a porous media filled with Williamson nanofluid in the current study. The importance of fluid flow over circular plates is owing to the variety of physical mechanisms they contain. Technically, such flows are important in lubrication, rotating machinery, crystal formation processes, and viscometry. Nanoparticles and motile gyrotactic microorganisms are included in the Williamson fluid model. The inclusion of an extrinsic magnetic field, which causes the production of an induced magnetic field between two circular plates, influences the flow. The impact of magnetic fields on lubrication drew attention because of the critical functions they play in a variety of industrial applications. For instance, the increased utilization of liquid metal lubricants in high-temperature bearings. : A numerical methodology known as the differential transform method is used to solve nonlinear differential equations. Computational software is utilized to handle coupled nonlinear problems utilizing the proposed technique. The Padé approximation is also employed with the suggested technique to improve the convergence rate. : The tabular and graphical approaches are used to discuss the simultaneous impact of various characteristics. On the axial and tangential velocity profiles, the rotational Reynold number shows a reverse trend. The magnetic field in both axial and tangential direction decreases as the magnetic Reynold number is increased. The effects of Prandtl number cause the temperature distribution to decline; similar occurrences are found at larger values of squeezed Reynolds number. Squeezing Reynolds number values increase nanoparticle concentration and motile microorganism profile. Brownian motion and thermophoresis parameters indicate opposing patterns for nanoparticle concentration. The motile microorganism profile is reduced when the Peclet number is increased, whereas the microorganism profile is increased when the bioconvection Schmidt number is increased. : The acquired results for the proposed mathematical modeling with DTM-Padé are new to the literature and are reported here for the first time.