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April 6, 2013, 14:44 |
New blending function in kOmegaSST
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#1 |
Senior Member
Tarak
Join Date: Aug 2010
Location: State College, PA
Posts: 111
Rep Power: 15 |
Hii,
The kOmegaSST model implemented in the latest version of OF contains a modified expression for nu_t with a changed blending function F23(), 00287 nut_ = 00288 ( 00289 a1_*k_ 00290 / max 00291 ( 00292 a1_*omega_, 00293 b1_*F23()*sqrt(2.0)*mag(symm(fvc::grad(U_))) 00294 ) 00295 ); where F23() is obtained from 00089 tmp<volScalarField> kOmegaSST::F3() const 00090 { 00091 tmp<volScalarField> arg3 = min 00092 ( 00093 150*nu()/(omega_*sqr(y_)), 00094 scalar(10) 00095 ); 00096 00097 return 1 - tanh(pow4(arg3)); 00098 } 00099 00100 00101 tmp<volScalarField> kOmegaSST::F23() const 00102 { 00103 tmp<volScalarField> f23(F2()); 00104 00105 if (F3_) 00106 { 00107 f23() *= F3(); 00108 } 00109 00110 return f23; 00111 } Can someone please explain me the reason for this change? |
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April 8, 2013, 06:21 |
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#2 | ||
Senior Member
Fumiya Nozaki
Join Date: Jun 2010
Location: Yokohama, Japan
Posts: 266
Blog Entries: 1
Rep Power: 18 |
Hi Tarak,
I found the answers in the following sites:
Fumiya |
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April 8, 2013, 12:47 |
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#3 |
Senior Member
Tarak
Join Date: Aug 2010
Location: State College, PA
Posts: 111
Rep Power: 15 |
Thanks a lot, Fumiya.
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