Numerical Simulation of Two-Dimensional Forced Convective Film Boiling Flow over a Horizontal Flat Surface

In this numerical study, a Coupled Level Set and Volume of Fluid (CLSVOF) interface capturing method with multi-directional advection algorithm is used to investigate the flow and heat transfer characteristics of a two-dimensional, incompressible, laminar, forced convective saturated film boiling over an isothermal horizontal flat plate without using the boundary layer approximations. In this study effects of both wall superheats and liquid free stream velocity are considered for water and refrigerant R-134a. Both heat transfer coefficient and wall shear stress are strongly dependent on the wall superheat and inflow free stream velocity and these effects are analysed. In the numerical simulation of forced convection saturated film boiling flows, the wall shear stress and the heat transfer coefficient results are validated with Cess and Sparrow(1) correlations developed based on the boundary layer approximations. The numerical results show good agreement with the correlations developed based on the boundary layer theory. (C) 2015 The Authors. Published by Elsevier Ltd.