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Calculation of Turbulent kinetic energy and turbulent dissipation rate

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Old   October 9, 2019, 02:32
Default Calculation of Turbulent kinetic energy and turbulent dissipation rate
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Hi Foamers,

I hope you are doing well. Currently, I am experiencing a problem of initializing the turbulent kinetic energy and turbulent dissipation of the k-omegaSST model for a pure natural convection case. I have a heated isothermal vertical plate inside a large computational domain. In order to solve this problem, I am using buoyantPimpleFoam (OpenFOAM v3.0.1). I know when I have inlet velocity I can easily calculate turbulent kinetic energy (k=3/2(IU)^2). But for pure natural convection (no inlet velocity, only buoyancy-driven flow), what is the assumption to calculate k? What will be the velocity U in that case?

Please help me to figure out this issue.

Cheers
Razon
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Old   October 13, 2019, 21:29
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Quote:
Originally Posted by Mondal131211 View Post
Hi Foamers,

I hope you are doing well. Currently, I am experiencing a problem of initializing the turbulent kinetic energy and turbulent dissipation of the k-omegaSST model for a pure natural convection case. I have a heated isothermal vertical plate inside a large computational domain. In order to solve this problem, I am using buoyantPimpleFoam (OpenFOAM v3.0.1). I know when I have inlet velocity I can easily calculate turbulent kinetic energy (k=3/2(IU)^2). But for pure natural convection (no inlet velocity, only buoyancy-driven flow), what is the assumption to calculate k? What will be the velocity U in that case?

Please help me to figure out this issue.

Cheers
Razon
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