Roy N.C.Hossain M.A.Hussain S.2026-08-272026-08-272016-02-01Roy, N., Hossain, M. A. & Hussain, S. (2016). Unsteady laminar mixed convection boundary layer flow near a vertical wedge due to oscillations in the free-stream and surface temperature. International Journal of Applied Mechanics and Engineering, 21(1), 169–186. https://doi.org/10.1515/ijame-2016-0011173444922-s2.0-84973100664https://hdl.handle.net/10361/29571The unsteady laminar boundary layer characteristics of mixed convection flow past a vertical wedge have been investigated numerically. The free-stream velocity and surface temperature are assumed to be oscillating in the magnitude but not in the direction of the oncoming flow velocity. The governing equations have been solved by two distinct methods, namely, the straightforward finite difference method for the entire frequency range, and the extended series solution for low frequency range and the asymptotic series expansion method for high frequency range. The results demonstrate the effects of the Richardson number, Ri, introduced to quantify the influence of mixed convection and the Prandtl number, Pr, on the amplitudes and phase angles of the skin friction and heat transfer. In addition, the effects of these parameters are examined in terms of the transient skin friction and heat transfer.169 - 186en-USBoundary layer flowFree-stream oscillationMixed convectionVertical wedgeLaminar boundary layer.Unsteady flow (Fluid dynamics).Heat--Convection--Mathematical models.Oscillations--Mathematical models.Article10.1515/ijame-2016-0011