Updating the turbulent schmidt number in dynamic smagorinsky model

pvpnrao · May 2, 2016, 19:23

I am trying to simulate a LES for density current case (driving force is density difference not pressure difference) . Using the Boussinesq approximation.

I am using the dynamic Smagorinsky library uploaded by Alberto. The library calculates the Smagorinsky constant in real time.

I understand that we need a dynamic process to calculate and update the Turbulent Schmidt number as well. That will help us in calculating the SGS flux in the filtered scalar transport equation for density transport

I am wondering if somebody has used dynamic Smagorinsky library for density currents and wrote the subroutine for updating the Turbulent Schmidt number as well (as described in Moin's 1991 paper).

On a separate note: Do you think this updation is required at all. What will be consequences of using a constant value for Turbulent Schmidt number.

pvpnrao · May 3, 2016, 18:46

Can anyone please provide some information

Tian Jin · November 5, 2020, 12:11

Hello, have you solved it? I have the same question here.

Santiago · November 6, 2020, 03:52

Hello guys, I have recently published some work related to SGS modelling of turbulent scalar transport in Buoyant flows:

https://www.mdpi.com/2311-5521/4/3/171

Check it out! PM me if you are interested in details.

May 2, 2016, 19:23	Updating the turbulent schmidt number in dynamic smagorinsky model	#1
pvpnrao Member Pavan Join Date: Jan 2016 Posts: 53 Rep Power: 10	I am trying to simulate a LES for density current case (driving force is density difference not pressure difference) . Using the Boussinesq approximation. I am using the dynamic Smagorinsky library uploaded by Alberto. The library calculates the Smagorinsky constant in real time. I understand that we need a dynamic process to calculate and update the Turbulent Schmidt number as well. That will help us in calculating the SGS flux in the filtered scalar transport equation for density transport I am wondering if somebody has used dynamic Smagorinsky library for density currents and wrote the subroutine for updating the Turbulent Schmidt number as well (as described in Moin's 1991 paper). On a separate note: Do you think this updation is required at all. What will be consequences of using a constant value for Turbulent Schmidt number.

November 6, 2020, 03:52		#4
Santiago Senior Member Santiago Lopez Castano Join Date: Nov 2012 Posts: 354 Rep Power: 15	Hello guys, I have recently published some work related to SGS modelling of turbulent scalar transport in Buoyant flows: https://www.mdpi.com/2311-5521/4/3/171 Check it out! PM me if you are interested in details.

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May 3, 2016, 18:46		#2
pvpnrao Member Pavan Join Date: Jan 2016 Posts: 53 Rep Power: 10	Can anyone please provide some information

November 5, 2020, 12:11		#3
Tian Jin New Member Tian Jin Join Date: Aug 2020 Posts: 10 Rep Power: 5	Hello, have you solved it? I have the same question here.