Work

Compressible boundary layers over isotropic porous surfaces

Year: 2025

Type: article

Abstract: A compressible laminar boundary layer developing over an isotropic porous substrate is investigated by asymptotic and numerical methods. The substrate is modeled as an array of cubes. The momentum and enthalpy balance equations are derived by volume averaging. The self-similar solution proposed by Tsiberkin [] for streamwise-growing permeability is extended to include compressibility, heat conduction, and a nonlinear drag. The velocity profile shows an inflection point at the free fluid-porous interfacial layer, below which it decreases to zero. A marked reduction of the adiabatic recovery temperature of the fluid and the velocity gradient at the interface is observed for high porosity, large grains, and relatively high Mach numbers. The temperature imposed at the bottom of the porous substrate has a negligible influence on the shear stresses.

Source: Physical Review Fluids

DOI: 10.1103/5j49-bxxs

Authors: Ludovico Fossà, Pierre Ricco

Institution: University of Sheffield

Language: English

Topic: Heat and Mass Transfer in Porous Media

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: Engineering and Physical Sciences Research Council, Air Force Office of Scientific Research

Awards: G2461229446, CBET-EPSRC: Transition and Turbulence in Compressible Boundary Layers Subjected to Concave Surface Curvature