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

Dombrowski N. | Zendy; Foumeny E. A. | Zendy; Ookawara S. | Zendy; Riza A. | Zendy

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

Author(s) -

Dombrowski N.,

Foumeny E. A.,

Ookawara S.,

Riza A.

Publication year - 1993

Publication title -

the canadian journal of chemical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.404

H-Index - 67

eISSN - 1939-019X

pISSN - 0008-4034

DOI - 10.1002/cjce.5450710320

Subject(s) - reynolds number , laminar flow , physics , pressure drop , mechanics , newtonian fluid , geometry , turbulence , mathematics

A 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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