Transactions of the Japan Society of Mechanical Engineers Series B
Online ISSN : 1884-8346
Print ISSN : 0387-5016
Characteristics of Combined Heat Transfer of Superheated Steam Drying : Numerical Study on Coupled Convection and Gas Radiation Heat Transfer
Hiroyuki IYOTANobuya NISHIMURATomohiro NOMURA
Author information
Keywords: Numerical study
JOURNAL FREE ACCESS

1998 Volume 64 Issue 619 Pages 821-828

Details
Abstract

A numerical study on a combined radiation and forced convection heat transfer of superheated steam, which is a radiation participating real gas, in thermally developing laminar flow through a parallel-plate channel has been conducted to investigate charactcristics of superheated steam drying. The integrodifferential energy equation was solved using an implicit finite-deference technique with a marching solution procedure and an exponential wide-band model for the treatment of the radiative transfer part. Comparison of results with and without gas radiation in various conditions shows that a fluid radiation decreases the temperature of main stream, but increases the total heat flux at a heat transfer surface. Furthermore, the results show that the fluid radiation decreases the inversion point temperature approximately to 150∼240°C with the increase of optical thickness. This numerical result agrees in the order of magnitude with the previous experimental studies, but is lower about 100K than that of former theoretical predictions without considering fluid radiation.

Content from these authors
© The Japan Society of Mechanical Engineers
Previous article Next article
feedback
Top