# Calculation of Turbulent kinetic energy and turbulent dissipation rate

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 October 9, 2019, 02:32 Calculation of Turbulent kinetic energy and turbulent dissipation rate #1 Member     Mondal Join Date: Sep 2018 Location: Canberra ACT Posts: 68 Rep Power: 7 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

October 13, 2019, 21:29
#2
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Mondal
Join Date: Sep 2018
Location: Canberra ACT
Posts: 68
Rep Power: 7
Quote:
 Originally Posted by Mondal131211 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
Any helps regarding this issue?