Akira Nakayama

TL;DR: In this paper, a complete set of macroscopic two-equation turbulence model equations has been established for analyzing turbulent flow and heat transfer within porous media, where the volume-averaged transport equations for the mass, momentum, energy, turbulence kinetic energy and its dissipation rate were derived by spatially averaging the Reynolds-averaging set of the governing equations.

TL;DR: In this article, a numerical experiment was conducted to determine the interfacial convective heat transfer coefficient in the two-energy equation model for convection in porous media, which is needed when the local thermal equilibrium between the fluid and solid phases breaks down.

TL;DR: In this article, a closed set of macroscopic governing equations for both velocity and temperature fields in intra-and extra-vascular phases has been established, for the first time, using the theory of anisotropic porous media.

TL;DR: In this article, the effects of packing form and particle shape on the flow and heat transfer inside small pores of some novel structured packed beds are numerically studied, where the packed beds with ellipsoidal or non-uniform spherical particles are investigated for the first time and some new transport phenomena are obtained.

TL;DR: In this article, porous media with a slightly smaller diameter to a tube are developed and inserted in the core of the tube under the constant and uniform heat flux condition, and the effect of porous radius ratio on the heat transfer performance is studied in numerical simulation.