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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: sbaffini

Forum: Main CFD Forum May 24, 2023, 05:11

Replies: 22 Boundary Conditions of Turbulent Channel Flow (DNS) Views: 950 Posted By sbaffini The periodicity part is fundamental here. While a... The periodicity part is fundamental here. While a pressure bc equivalent to the linear pressure drop can be obtained, the actual bc can't really be that one on pressure alone on both inlet and outlet...

Forum: Main CFD Forum May 23, 2023, 11:36

Replies: 22 Boundary Conditions of Turbulent Channel Flow (DNS) Views: 950 Posted By sbaffini Because: f_x = 1 = - \left(-1\right) = -... Because: f_x = 1 = - \left(-1\right) = - \left(\frac{dp_0}{dx}\right) = - \left[\frac{d\left(-x\right)}{dx}\right] so it implies the existence of a p_0=-x pressure that is linearly...

Forum: Main CFD Forum May 23, 2023, 10:18

Replies: 22 Boundary Conditions of Turbulent Channel Flow (DNS) Views: 950 Posted By sbaffini Exactly. Once you look at the equations, your... Exactly. Once you look at the equations, your forcing term will be equivalent to an average pressure gradient, which will need an average wall shear stress to be balanced in the periodic setting. So,...

Forum: Main CFD Forum May 23, 2023, 09:32

Replies: 22 Boundary Conditions of Turbulent Channel Flow (DNS) Views: 950 Posted By sbaffini Yes but, practically, it also depends from the... Yes but, practically, it also depends from the specific scheme. The basic idea is to extend your scheme stencil at the boundaries using values from the other side

Forum: Main CFD Forum May 23, 2023, 08:50

Replies: 22 Boundary Conditions of Turbulent Channel Flow (DNS) Views: 950 Posted By sbaffini As mentioned by LuckyTran, you need periodic bc's... As mentioned by LuckyTran, you need periodic bc's on pressure as well. All the other answers are YES

Forum: Main CFD Forum May 20, 2023, 08:55

Replies: 22 Boundary Conditions of Turbulent Channel Flow (DNS) Views: 950 Posted By sbaffini Said otherwise, you need periodic boundary... Said otherwise, you need periodic boundary conditions and an x-momentum source term = 1, everything else is as usual

Showing results 1 to 6 of 6

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