[ergk-10]

I am setting up a transient simulation with an inlet and outlet that will only be activated after a certain amount of time, until which they will be modelled as walls. As walls it is of course prudent to have an inflation layer at these surfaces to capture the large velocity gradient, however to keep the mesh simple I am considering leaving the mesh unchanged once the inlet/outlet BCs are activated.



I am now wondering if there is a downside to having an inflation layer over an inlet/outlet surface beyond maybe having more elements than are really necessary?


In general, what are the implications of using an inflation layer at an inlet/outlet? Are there accuracy/stability reasons to avoid this? Or is it simply overkill in most situations?


Thanks for any thoughts!