Hi My project SimScale has air flow in and out over a block and I see the post processing to show me that the material in our case-air is inviscid as the flow isn’t seperating/turbulence at the trailing edge of the block. Fairly new to CFD. How can I ensure that flow is viscous and why is this …

Hi H.Mattoo ( @hmattoo )! Please set your project to public first of all. All the best! Jousef

Hey @hmattoo interesting project you have there in main time if you expecting a flow separation you have to do more on your mesh when all solids pass through fluids or stationary objects subjected to moving fluid they acquire a boundary layer of a fluid around them when the viscous force occurs i…

Hi @Anware Thank you for the support, I understand that I need to improve the mesh and add inflate boundary layer in the mesh settings. -The block is to imitate a car hence the floor was moving, but did I do it right? -Also wanted to clarify why can’t I see turbulent flow at the back end of this …

Hy @hmattoo The wind tunnel test work by reverse velocity, in reality if it is quit nice sunny day with no winds only our car is moving when the atmospheric air is stationery and the road acts as a wall, when we model this in wind tunnel we reverse the reality making the car stationary and moving …

Hi @Anware & @hmattoo ! Accidentally stumbled upon this post and want to mention that there is a significant difference between using a moving wall boundary condition and ignoring this boundary condition as this is similar with a Poiseuille flow/Couette flow below the car which are two completely di…

Hi, In this case the block is on the floor without any gap, like if the geometry was sliding across the ground. If you want to simulate a block that resembles a car, you could have a look at the Ahmed body . As per the ground’s boundary condition, it mostly depends on what you want to correlate. If…

Hi @Anware I’m still facing the vorticity problem in my Vortex generator project : SimScale -The mesh quality doesn’t seem to be improving -I ran a trial simulation and still cannot see any vortices clearly or even by using the Slice option to see the rotational impact on the Slice plane. Pleas…

Any updates on that one @hmattoo although my response is way too late which I am sorry for by the way :wink: Cheers! Jousef

SimScale CAE Forum

Viscous/Inviscid CFD Flow

Using SimScale

hmattoo December 19, 2017, 9:17pm 3

Hi Jousef

Thank you for your quick reply!
I have made it public.

Sorry about that