Unsteady forced and free convection flow with mass‐transfer and chemical reaction past an infinite vertical porous plate with oscillating plate temperature

Abstract

An approximate analysis of a two‐dimensional unsteady flow of chemically reacting gases is presented under the following conditions: (1) Constant suction at the plate, (2) the plate temperature is oscillating about a non‐zero constant mean, (3) the uniform free‐stream velocity, (4) presence of foreign mass with negligible Soret‐Dufour effects, (5) first‐order chemical reaction, and (6) small amplitude. Solutions to the mean velocity, the mean temperature, the transient velocity, the transient temperature, the amplitude and phase of the skin‐friction and the rate of heat transfer are derived. It is observed that due to the presence of a chemical reaction, the mean skin‐friction decreases but the mean rate of heat transfer increases.