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Re: Drag Coefficient (Cylinder 2D)

OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Drag Coefficient (Cylinder 2D) › Re: Drag Coefficient (Cylinder 2D)

August 29, 2016 at 1:42 pm #2434
aliiab
Member

Hi, Liliana, Pedro!rnrnI am intrested in drag force too. I simulate the fluid flow in a rectangular channel with sphere in its center. So if

Quote:
drag given by the code is already the drag coefficient

, it should be equal to the 0.47 for Re = 10 000 (https://en.wikipedia.org/wiki/Drag_coefficient). But in my simulation it’s about 5.0, but it is not a constant value (fluid velocity and density are constant in this simulation). Can you explain the reason of such difference?rnAlso can you tell me, how OpenLB calculates the Reynolds number?rnrnThanks,rnAlina.