Laminar convective heat transfer in the entrance region between parallel flat plates
laminarconvectiv00lund.pdf (3.942Mb)Abstract
Heat transfer rates for laminar, convective heat transfer in the entrance region between parallel plates are investigated. The hydro-dynamic solution due to Bodia (2) was used in the solution of the energy equation in finite difference form on a digital computer. The thermal boundary conditions include: constant heat input, constant wall temperature, one wall constant temperature and one wall insulated, and constant but different wall temperatures on the upper and lower walls. The approximate, integral methods of Siegel and Sparrow (6) and (7) produce results that are in close agreement with the solutions in this analysis for the constant heat input and constant wall temperature cases.
The scope of the finite difference solution is limited to a narrow range of Prandtl numbers near unity, due to the small grid sizes required for convergence at small Prandtl numbers and to the overly low transfer rates indicated near the entrance for high Prandtl numbers, which is a result of the "finite starting length."
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
Route Optimization for Multiple Searchers
(August 26,);We consider a discrete time-and-space route-optimization problem across a finite time horizon in which multiple searchers seek to detect one or more probabilistically mov- ing targets. The paper formulates a novel convex ... -
Axial heat conduction effects in laminar duct flow
(Monterey, California. Naval Postgraduate School, 1998-06-01);A numerical model for heat transfer in laminar duct flows has been developed using the finite difference method to explore the significance and extent of "back-conduction" at low Peclet numbers. The calculations have been ... -
Temperature Distributions in Thin Circular Disks with Variable Thickness, Thermal Conductivity, and Heat Transfer Coefficient (A Direct Variational Approach using Rayleigh Ritz Approximation)
(Monterey, California. Naval Postgraduate School, 1966); Technical Note No. 66T-5An approximate solution for the temperature distribution in a thin circular disk having variable thermal properties, variable thickness, and a variable surface heat transfer coefficient is presented. The method used was ...
