12 0

A Numerical Study of the Thermal Entrance Effect in Miniature Thermal Conductivity Detectors

Title
A Numerical Study of the Thermal Entrance Effect in Miniature Thermal Conductivity Detectors
Author
김우승
Issue Date
2005-12
Publisher
HEMISPHERE PUBL CORP
Citation
HEAT TRANSFER ENGINEERING, v. 26, No. 4, Page. 65-72
Abstract
The microchannel flow in miniature TCDs (thermal conductivity detectors) is investigated numerically. Solutions based on the boundary-layer approximation are not very accurate near the channel inlet for low Reynolds numbers. As a result the full Navier-Stokes equations were solved to analyze the gas flow in a miniature TCD. The effects of channel size and inlet and boundary conditions on the heat transfer rate were examined. When the gas stream is not preheated, the distance for a miniature TCD to reach the conduction-dominant region is approximately two to three times the thermal entry length of a constant property pipe flow subject to a uniform thermal boundary condition. If the gas inlet temperature is in the vicinity of the mean gas temperature in the conduction-dominant region, the entrance length is much shorter and very close to that of a constant property pipe flow with uniform surface temperature or heat flux.
URI
https://www.tandfonline.com/doi/full/10.1080/01457630590916293http://repository.hanyang.ac.kr/handle/20.500.11754/111984
ISSN
0145-7632; 1521-0537
DOI
10.1080/01457630590916293
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE