# Wind turbulence measurement

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 March 10, 2010, 07:16 Wind turbulence measurement #1 New Member   Join Date: Mar 2010 Posts: 2 Rep Power: 0 Hi, How can one measure wind turbulence in PHOENICS. I add up (stored of TINT is KE^0.5/VABS with IMAT<100) in “IN FORM7” for turbulence intensity but I don't know what it means and how it’s working. Its output results are also very suspicious.

 March 10, 2010, 08:58 #2 New Member   Join Date: May 2009 Location: Germany Posts: 25 Rep Power: 10 Hi Vaulter, to calculate the turbulence intensity you just need KE. For isotropic turbulence: KE=0.5*(u'**2+v'**2+w'**2) = 0.5*(3 u'**2). the turbulence Intensity: I=u'/Vabs= SQRT(3/2*KE)/Vabs. (stored of TINT is KE^0.5/VABS with IMAT<100) means that you store a new variable named TINT and that TINT= SQRT(KE)/Vabs I´m not quite sure why you choose this formula i would recommend the one i mentioned above. If you want to model the Wind just try the Wind Object (see POLIS) Linh

March 10, 2010, 10:49
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 Originally Posted by Linh.Hoang Hi Vaulter, to calculate the turbulence intensity you just need KE. For isotropic turbulence: KE=0.5*(u'**2+v'**2+w'**2) = 0.5*(3 u'**2). the turbulence Intensity: I=u'/Vabs= SQRT(3/2*KE)/Vabs. (stored of TINT is KE^0.5/VABS with IMAT<100) means that you store a new variable named TINT and that TINT= SQRT(KE)/Vabs I´m not quite sure why you choose this formula i would recommend the one i mentioned above. If you want to model the Wind just try the Wind Object (see POLIS) Linh
Thanks Linh I will check it out...

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