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how to calculate time averaged skin friction coefficient |
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May 25, 2016, 17:00 |
how to calculate time averaged skin friction coefficient
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#1 |
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anonymous
Join Date: Nov 2015
Posts: 4
Rep Power: 10 |
how to calculate time averaged skin friction coefficient and time averaged pressure coefficient in fluent. I simulated cases of NACA 0012 at angle of attacks 0,1,2,,,30 . I have plotted skin friction coefficient by Fluent Results but it seems there is kind of problem. None of the plot showed any negativity in friction coefficient. Please somebody help
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May 25, 2016, 18:07 |
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#2 |
Senior Member
Join Date: Mar 2015
Posts: 892
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You'll need to store the time-averaged results by enabling "Data Sampling for Time Statistics" under Run Calculation. First, establish a developed flow (say the drag coefficient is oscillating or use a similar definition), and then enable the time statistics to capture the developed time-averaged solution.
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January 28, 2017, 05:00 |
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#3 |
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Smruti Ranjan Jena
Join Date: Jan 2017
Location: Odisha, India
Posts: 5
Rep Power: 9 |
Hi all,
I am puzzled with the calculation of time-averaged pressure coefficient. I am now running a case of turbulent flow past a cylinder. Where should it be calculated in a flow field? The formula in Wikipedia suggests that there should be some freestream pressure value in the numerator, namely (P-P_infinity). In my domain inlet pressure boundary is of Neumann type and outlet is at P=0. So, will someone please guide me? |
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