DNS of supercritical CO2 flow in a heated pipe

calf.Z · November 9, 2018, 22:26

Hello foamers,

I am new to DNS. And my work is researching heat-transfer deterioration of supercritical carbon dioxide flow in a heated vertical circular pipe by using DNS in OpenFOAM.

Now I am confused about several questions, hoping you can help me:

1.If I set simulationtype to laminar and refine the mesh, should it be called DNS?

2.I want to develop my DNS solver depending on buoyantPimpleFoam, is this foam suitable for DNS modifying?

3.In the code, can turbulence->divDevRhoReff(U) and turbulence->alphaEff() have influences on Solving the NS equation directly？

4.I am confused about the low-Mach-number assumption. Are the compressible equations being simplified into incompressible problem？Any special modification of code is needed for low-Mach-number assumption？

I am confused about these questions above.Any suggestions or guides is highly appreciated.

Regards,
Calf.Z

calf.Z · November 11, 2018, 04:05

Anyone is interested in DNS of pipe flow？

Can you give me some suggestions on the questions above ？

Thank you.

November 9, 2018, 22:26	DNS of supercritical CO2 flow in a heated pipe	#1
calf.Z Senior Member Jianrui Zeng Join Date: May 2018 Location: China Posts: 157 Rep Power: 8	Hello foamers, I am new to DNS. And my work is researching heat-transfer deterioration of supercritical carbon dioxide flow in a heated vertical circular pipe by using DNS in OpenFOAM. Now I am confused about several questions, hoping you can help me: 1.If I set simulationtype to laminar and refine the mesh, should it be called DNS? 2.I want to develop my DNS solver depending on buoyantPimpleFoam, is this foam suitable for DNS modifying? 3.In the code, can turbulence->divDevRhoReff(U) and turbulence->alphaEff() have influences on Solving the NS equation directly？ 4.I am confused about the low-Mach-number assumption. Are the compressible equations being simplified into incompressible problem？Any special modification of code is needed for low-Mach-number assumption？ I am confused about these questions above.Any suggestions or guides is highly appreciated. Regards, Calf.Z

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November 11, 2018, 04:05		#2
calf.Z Senior Member Jianrui Zeng Join Date: May 2018 Location: China Posts: 157 Rep Power: 8	Anyone is interested in DNS of pipe flow？ Can you give me some suggestions on the questions above ？ Thank you.