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May 14, 2016, 07:51 |
how to find Cp value. any methods
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#1 |
New Member
Anuranga
Join Date: Aug 2015
Posts: 1
Rep Power: 0 |
how to find pressure co-efficient in openfoam ?
hope your kind consideration for this. im validation openfoam by using onera m6 wing |
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May 15, 2016, 01:47 |
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#2 |
Senior Member
Join Date: Jun 2012
Location: Germany, Bochum
Posts: 230
Rep Power: 15 |
You can get the pressure using probes (time history at specific points) or the sample utility (values at one time step). If you have the pressure, calculating the pressure coefficient can be done by yourself. For mean pressures you need to add information about the averaging in the controlDict file. Search the forum/web for information. Let me know if you have more questions.
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May 15, 2016, 07:28 |
we dont know what are the pressure values and how to calculate Cp from it
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#3 | |
New Member
kalpa lakmal
Join Date: Apr 2016
Location: srilanka
Posts: 3
Rep Power: 10 |
Quote:
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May 15, 2016, 07:33 |
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#4 |
Senior Member
Join Date: Jun 2012
Location: Germany, Bochum
Posts: 230
Rep Power: 15 |
The pressure values for each time are stored in the time directories in the files named "p". look in any textbook to find the formulation of the pressure coefficient: is (total pressure-reference pressure) /dynamic pressure. The denominator is the value that you find in the "p" files.
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May 15, 2016, 07:54 |
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#5 | |
New Member
kalpa lakmal
Join Date: Apr 2016
Location: srilanka
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Quote:
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May 15, 2016, 10:36 |
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#6 | |
New Member
eu sou cfd
Join Date: Jun 2012
Location: Brazil
Posts: 18
Rep Power: 13 |
Hello Kalpa. A quick search showed me this:
Quote:
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