Accession Number : AD0475237

Title :   TRANSIENT HEAT TRANSFER IN POROUS MEDIA.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Hiep, Dang Dinh

Report Date : 1965

Pagination or Media Count : 129

Abstract : The general differential equations describing unsteady-state heat transfer with a fluid flowing through a porous medium are derived. These equations represent a physical model for heat transfer in thermal oil-recovery process, packed-bed chemical reactors, and heat regenerators. Fluid-solid convective heat transfer and longitudinal conduction in both the fluid and solid phases are considered. Laplace transformation and numerical inversion are used to solve the system of partial differential equations. A digital computer program obtains the numerical results which are compared to those of Green and Perry using finite difference technique, and to experimental data of Preston. Also presented are analytical solutions for the cases where the longitudinal conduction is neglected and the convective heat transfer coefficient is assumed to be infinite. These solutions are programmed and results are compared to those from the general case. The effect of different heat transfer mechanisms on temperature profiles at low fluid velocities is studied. The results show that this numerical method gives accurate results with relatively short computational time. (Author)

Descriptors :   *POROUS MATERIALS), (*HEAT TRANSFER, THEORY, OILS, RECOVERY, FLUID FLOW, CONDUCTIVITY, CONVECTION, INTEGRAL TRANSFORMS, NUMERICAL ANALYSIS, NUMERICAL METHODS AND PROCEDURES, COMPUTER PROGRAMMING, PROGRAMMING LANGUAGES, TEMPERATURE, VISCOSITY, THERMAL CONDUCTIVITY, VELOCITY.

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE