Radiative heat and mass transfer analysis in main stream velocity which oscillates without reversing
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Date
2021
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UMT Lahore
Abstract
Within recent work the phenomenon of mixed convective heat and mass exchange/transfer in free stream which oscillates without turning over the semi-endless vertical heated plate ( y = 0 , x ≥ 0) within the sight of thermal radiation is investigated.fluid under consideration is viscous, incompressible and optically dense grey. The temperature of the plate is uniform and greater than that of oncoming fluid. In this analysis the free stream velocity is of the form U (x, t) = Uo(x)V (ωt) = Uo(x)(1 + α1sinωt), where 0 ≤ α1 < 1 is the amplitude parameter, Uo(x) ∝ xn, and 0 ≤ n < 1. Three cases for n = 0 (level plate), n = 1 3 (wedge of semi-vertex angle 1 4 π) and n = 1 (stagna- tion point) are discussed. A gathering of transformations is introduced to decrease the boundary layer equations to advantageous form of the equations for integration . The solutions of the transformed model are obtained by employing the asymptotic expansions for the small and large values of the frequency parameter 1 = ωx Uo(x) . The effect of involved dimensionless parameters such as Richardson number, Mod- ified Richardson number, Prandtl number and Schmidt number is analyzed. Main aim of this study is to analyze the composite matching of inner and outer solutions to observe the behaviour of radiative heat and mass transfer in free stream which oscillates without reversing.