Unified Nusselt- and Sherwood-number correlations in axisymmetric finite-gap stagnation and rotating-disk flows

Abstract

a b s t r a c tThis paper develops a unified analysis of stagnation flow heat and mass transport, considering both semiinfinite domains and finite gaps, with and without rotation of the stagnation surface. An important objective is to derive Nusselt-and Sherwood-number correlations that represent heat and mass transport at the stagnation surface. The approach is based on computationally solving the governing conservation equations in similarity form as a boundary-value problem. The formulation considers ideal gases and incompressible fluids. The correlated results depend on fluid properties in terms of Prandtl, Schmidt, and Damköhler numbers. Heterogeneous chemistry at the stagnation surface is represented as a single first-order reaction. A composite Reynolds number represents the combination of stagnation flows with and without stagnation-surface rotation.Published by Elsevier Ltd.

Numerical Simulation of Methane and Propane Reforming Over a Porous Rh/Al2O3 Catalyst in Stagnation-Flows: Impact of Internal and External Mass Transfer Limitations on Species Profiles

“…The stagnation-flow reactor (SFR) offers a simple geometry to investigate the aforementioned chemical and physical processes and their interactions in a heterogeneous catalytic process that are relevant in practical reactor applications [41,42]. Its fluid-mechanical properties enable measuring and modeling the gas-phase boundary layer adjacent to the zero-dimensional catalytic surface [41,43].…”