TURBULENT HEAT TRANSFER IN THE THERMAL ENTRANCE REGION OF A PERFECTLY INSULATED PIPE
Abstract
The problem considered is that of finding the thermal entrance or thermal mixing region of a pipe where the wall heat flux is zero along the length of the pipe. The fluid is assumed to enter the pipe with a non-uniform temperature profile and a fully developed turbulent velocity profile. The approach is analogous to that introduced by Fettis for the solution of the uniform wall temperature problem. The results for different radii tubes and Reynolds numbers are presented in graphs which show the adjustment of the temperature profile down the pipe. These results provide information concerning the minimum length mixing tube, since any wall losses will require a greater length.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1966
- Accession Number
- AD0648497
Entities
People
- John W. Goresh
- Robert G. Dunn
Organizations
- Air Force Research Laboratory