Some considerations on frictional losses evaluation of a water flow in microtubes |
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| Affiliation: | 1. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;2. School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;1. Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, Studentska 2, Liberec 46117, Czech Republic;2. Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, Liberec 46117, Czech Republic;1. School of Civil Engineering, Central South University of Forestry & Technology, Changsha 410004, Hunan, PR China;2. Department of Civil and Environmental Engineering, Voiland College of Engineering and Architecture, Washington State University, P.O. Box 642714, Pullman, WA 99164, USA |
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| Abstract: | In the present paper numerical modeling of a water flow through microtubes was made in order to analyze the behavior of the Poiseuille constant for the case of heating fluid flow inside the microtube. The microtube from the experimental research presented in D. Lelea, S. Nishio, K. Takano, International Journal of Heat and Mass Transfer 47, pp. 2817–2830 (2004). (Journal Article)] 5] was used as a model. The length to diameter ratio of the tube was very large (L/Di = 1200), and a tube diameter was Di = 0.5 mm. Only a portion of the tube was heated with a Joule heating and the heating length was Lh = 250 mm. The working fluid was distilled water and a laminar regime is considered Re < 800. The input power was 2 W. |
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