Effect of variable viscosity on oscillatory heat and mass transfer in mixed convective flow with chemical reaction along inclined heated plate under reduced gravity

Reduced gravity refers to the actual decline in the accelerated motion of gravitation that occurs when a particular fluid comes into contact with another fluid that has different densities as a result of buoyant effects. The reduced gravity mechanism is very affective along the inclined geome-tries to reduce more gravitational pressure. In comparison to ordinary action of gravity, reduced gravity was reported to demonstrate less heat transfer, which helped to thicken the liquid layers. The main objective of this study is to illustrate the effects of chemical reaction and variable viscosity on oscillatory behavior of heat and mass transfer along an inclined heated plate under reduced grav-ity. The viscosity of fluid is assumed as a function of temperature. The mathematical model is devel-oped in terms of partial differential equations and converted into steady and oscillating part by using oscillating Stokes conditions. The primitive variable formulation is used to convert steady and oscillating part into convenient form for smooth algorithm. The numerical results are deduced in tables and graphs with the help of FORTRAN and Tecplot 360. The velocity, temperature dis-tribution, concentration profile, oscillatory skin friction, heat transfer and mass transfer are plotted for various governing parameters. The range of parameters has selected according as Prandtl num-ber 0.1 < Pr < 7.0, buoyancy parameter 0 < kT, kC < 00, Schmidt number 1.0 < Sc < 6.0, 0.1 < Rg < 8.0 and the choice of reaction rate parameter set the effects of chemical reaction respec-tively. The results show that the velocity profile increases as viscosity decreases under reduced grav-ity. It can be seen that temperature profile decreases as reduced gravity increases with lower viscosity. It is noticed that the heat and mass transfer increases with significant amplitude in the presence of reduced gravity and chemical reaction.& COPY; 2023 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).