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Re doubt calculation and classification high-low |
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December 24, 2018, 03:07 |
Re doubt calculation and classification high-low
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#1 |
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Nicola D'Ettole
Join Date: Nov 2018
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Hi,
i have to analyze a rectangular duct L= 124[mm] h=3[mm]. Liquid=water , U=10 [m/s] - For the calculation of Re i have to use hydraulic diamter or h ? - Re =57000 is high o low Reynolds Number ? trying different turbulences model i found a lot of difference beetwen high and low re models..... -what turbulence model do you suggest ? For similar problem with L=1390[mm] h= 3[mm] ... can i consider it as a duct ? |
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December 25, 2018, 10:17 |
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#2 |
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ANKUR GARG
Join Date: Mar 2017
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I just know that you must use h for the calculation of Re. What is the viscosity value in your case?
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Ankur Garg |
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December 26, 2018, 06:17 |
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#3 |
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Nicola D'Ettole
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Kinematic viscosity is 1e-6.
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December 26, 2018, 08:44 |
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#4 |
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ANKUR GARG
Join Date: Mar 2017
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In that case your Re is 30,000 (high). Which is more than enough for a turbulent flow to occur inside a rectangular duct. I don't have any idea with respect to turbulence model though!
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