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The influence of reynolds number on the entry length and pressure drop for laminar pipe flow

 

作者: N. Dombrowski,   E. A. Foumeny,   S. Ookawara,   A. Riza,  

 

期刊: The Canadian Journal of Chemical Engineering  （WILEY Available online 1993）
卷期: Volume 71, issue 3  

页码: 472-476

 

ISSN:0008-4034

 

年代: 1993

 

DOI:10.1002/cjce.5450710320

 

出版商: Wiley Subscription Services, Inc., A Wiley Company

 

关键词: boundary layer;entry length;finite elements;finite difference

 

数据来源: WILEY

 

摘要:

AbstractA numerical analysis of the laminar flow of a Newtonian fluid in the inlet section of a circular pipe has been carried out for a Reynolds number range of 0 to 500, employing a finite element based CFD code. A new flow phenomenon has been identified at low Reynolds numbers (<50), viz, the existence of a peak in the axial pressure profile at a small distance from the entrance. Existing correlations for the entry length are shown to be insufficient and a new correlation for the entry length is proposed.

 

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