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.

hi can u tell me what u r modeling so that i can answer ur question

Rashmi

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

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

[jainsiddhant19@gmail.com]

Can u please tell me the source of above info