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how to specify the inlet turbulence kinetic energy

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Old   December 3, 2005, 05:26
Default how to specify the inlet turbulence kinetic energy
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rajesh
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Can any body please help me how to specify inlet boundary condition for turbulent flow. Because it is asking for parameters like turblence reference velocity, % mean velocity, % hydraulic diameter, turbulence kinetic energy, turbulence dissipation rate.

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Old   December 3, 2005, 07:00
Default Re: how to specify the inlet turbulence kinetic en
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Rashmi
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hi can u tell me what u r modeling so that i can answer ur question

Rashmi
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Old   December 3, 2005, 07:16
Default Re: how to specify the inlet turbulence kinetic en
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rajesh
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i am trying to model water cooling jacket of a diesel engine, for that i need inlet specifications. i know the mean mass flow rate and pressure. thank you
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Old   December 3, 2005, 19:52
Default Re: how to specify the inlet turbulence kinetic en
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Halim
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The followings are what the CFX code is doing;

TEin=1.5*(0.037*Vin)**2,

EDin=TEin**1.5/(0.3*D)

where TEin is the turbulent kinetic energy at inlet, EDin is its dissipation rate at inlet, Vin is the inlet velocity and D is the inlet length scale such as the hydraulic diameter. The value 0.037 (3.7%) is the turbulence intensity and you can change it. I hope this helps.

Good luck,

Halim
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Old   Yesterday, 07:27
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Siddhant Jain
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Can u please tell me the source of above info
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