Thermophysical Analysis of Water Based (Cu–Al2O3) Hybrid Nanofluid in an Asymmetric Channel with Dilating/Squeezing Walls Considering Different Shapes of Nanoparticles

Abstract

An innovative concept of water-based Cu–Al2O3 hybrid nanofluid has been employed to investigate the behavior of flow and heat transfer inside a rectangular channel whose permeable walls experiences dilation or contraction in height. The transformed set of ordinary differential equations is then solved by a well-known Runge–Kutta–Fehlberg algorithm. The analysis also includes three different shapes of copper nanocomposites, namely, platelet, cylinder and brick- shaped. The impact of various embedded parameters on the flow and heat transfer distributions have been demonstrated through the graphs. All the flow properties, temperature profile and rate of heat transfer at the walls are greatly influenced by the presence of copper nanoparticles. Furthermore, it was observed that the platelet shaped nanocomposites provide a better heat transfer ability as compared to the other shapes of nanoparticles.

Second law analysis in radiative mixed convective squeezing flow of Casson fluid between parallel disks with Soret and Dufour effects

“…The reduced nonlinear ODEs are solved numerically by shooting method with Runge‐Kutta fourth‐order scheme. The outcomes are analyzed for nondimensional velocity components, temperature, concentration, entropy generation, and Bejan number with respect to various fluid and geometric parameters and presented in the form of graphs and table and from these, we concluded that The temperature profile of the fluid is enhanced with the radiation parameter, whereas the concentration decreases with the Eckert number. The Soret and Dufour parameters exhibit a similar trend for heat and mass transfer characteristics of Casson fluid. The Bejan number of the fluid is raised with a radiation parameter, whereas the entropy is decreased with the Casson fluid parameter. The temperature and concentration profiles of the fluid decrease with the squeezing Reynolds number. The effects on Bejan number for the Schmidt number and Dufour number are an opposite trend. The Schmidt and Dufour numbers exhibit the opposite trend for Bejan number The profiles of velocity components are similar for Casson fluid parameter and squeezing Reynolds number The current results show good agreement with the published work for a viscous fluid.…”

“…From the figure, it is observed that as Du increases the temperature and concentration follow the same trend of Sc , whereas entropy generation number, Bejan number follows the opposite trend. Table represents the numerical outcomes of the coefficient of skin friction and Nusselt number at the upper plate for the viscous case and compared with existing results …”

“…The steady laminar flow and heat transfer of a Casson fluid over a nonlinearly stretching surface had been analyzed by Mukhopadhyay . We can see the recent research related to this study in references . Hayat et al had considered MHD 2D squeezing flow of viscous fluid confined between parallel disks with temperature distribution and the reduced nonlinear ODEs are solved by HAM.…”

“…The geometry is a cylindrical coordinate system ( r , ϕ, z ) here since the rotational symmetry of the flow. The governing equations of unsteady 2D unsteady heat and mass transfer of Casson fluid in the influence of mixed convection, radiation, Soret and Dufour are as follows: …”

Bioconvection in a squeezing flow of a micropolar fluid in a horizontal channel

“…Gupta and Gupta identified that the unsteady squeezing channel flow problem could be simplified to the remarkable extent through similarity transformation in the case that the parallel plates are kept at a distance, which varies as the square root of a linear function of time. The unsteady squeezing flow problems were investigated by several researchers, eg, Verma, Singh et al, Hamza, Duwairi et al, Mustafa et al, Umar Khan and coworkers, Khan et al, Mohyud‐Din et al, Adnan et al, Adesanya et al, Saba et al, Khan et al, and Sultan et al with consideration of various physical properties and computational techniques.…”