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Old   May 19, 2005, 01:18
Default Pressure force
  #1
shyam
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Dear all, I am doing cfd analysis to find wind pressure on anattena. With inlet velocity 16.67 m/s, I got static pressure around 169 pa and total pressure 206 pa. What pressure shall I consider as force, which is really acting on antenna, whether static or total(static + dynamic). Please help me

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Old   May 19, 2005, 03:41
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Luca
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static. Luca
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Old   May 19, 2005, 05:06
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shyam
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Hi luca But why only static? why not total?
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Old   May 19, 2005, 05:45
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Luca
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Because you're interested in loads, so you need to evaluate the difference betweeen local static pressure and free-stream pressure (coefficient of pressure).Luca
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Old   May 19, 2005, 15:52
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us
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It sounds confusing to me. Isn't it should be total pressure? If only Load consideration then Static pressure is fine. But when it's about pressure force, then there should be total pressure, if the surface where the pressure force is to be considerred is perpendicular to the flow. Luca, can you clarify my doubt?
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Old   June 5, 2005, 05:40
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Przemek
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I have same problem but in the water. Since decembre I am looking for same answer. As I understand you should use static but you have to prepared so fine mesh in boundary to get in first layier dynamic pressure equal 0. please give me notice if you find some thing more?
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