TY - JOUR

T1 - Natural convection heat transfer in a porous matrix with significant fluid property changes

AU - Masuda, Yoshio

AU - Kimura, Shigeo

AU - Hayashi, Kazuo

PY - 1991/6

Y1 - 1991/6

N2 - Natural convection heat transfer in a porous matrix with significant fluid property changes under high pressure and temperature is analyzed by a finite element method. A specific problem involves convection in a square box heated from one side. The fluid properties are mostly tabulated from a steam table, but the viscosity is calculated from temperature and density. It is found that the average heat transfer characteristics with significant fluid property changes do not differ much from those with Boussinesq approximation, if the Rayleigh number is defined at the algebraic mean temperature. However, local Nusselt numbers and temperature fields exhibit measurable deviations, primarily due to significant viscosity changes.

AB - Natural convection heat transfer in a porous matrix with significant fluid property changes under high pressure and temperature is analyzed by a finite element method. A specific problem involves convection in a square box heated from one side. The fluid properties are mostly tabulated from a steam table, but the viscosity is calculated from temperature and density. It is found that the average heat transfer characteristics with significant fluid property changes do not differ much from those with Boussinesq approximation, if the Rayleigh number is defined at the algebraic mean temperature. However, local Nusselt numbers and temperature fields exhibit measurable deviations, primarily due to significant viscosity changes.

UR - http://www.scopus.com/inward/record.url?scp=0026172599&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026172599&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0026172599

VL - 57

SP - 2065

EP - 2069

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 538

ER -