Experimental investigation of pressure drop and friction factor for water flow in microtubes

被引：22

作者：

Barlak, S. ^{[2
]}

Yapici, S. ^{[2
]}

Sara, O. N. ^{[1
]}

机构：

[1] Cankiri Karatekin Univ, Fac Engn, Dept Chem Engn, TR-18200 Cankiri, Turkey

[2] Ataturk Univ, Fac Engn, Dept Chem Engn, TR-25240 Erzurum, Turkey

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2011年 / 50卷 / 03期

关键词：

Microchannel; Microtube; Pressure drop; Friction factor; Laminar flow; TRANSITION REGION; HEAT-TRANSFER; SURFACE-ROUGHNESS; FLUID-FLOW; MICROCHANNELS; TUBE;

D O I：

10.1016/j.ijthermalsci.2010.08.018

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The pressure drop and friction factor for the flow distilled water in microtubes with the diameters ranging from 0.20 mm to 0.589 mm were investigated experimentally. The experiments were carried out in the Reynolds number range of approximately 100-10000 and the length-to-diameter ratios (L/d) in the range of 16-265. It was observed that two different mechanisms of transition from laminar to turbulent flow occurred as smooth and abrupt. The pressure drop and friction factor values agreed with the values of classical channel flow theory. The L/d ratio had an important effect on the apparent friction factor in case of L/d < 100. It was found that the critical Reynolds number for the transition was between 2000 and 2500. (C) 2010 Elsevier Masson SAS. All rights reserved.

引用

页码：361 / 368

页数：8

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