Regarding code capabilities

[Flyingsai]

Respected Sir,

I am a beginner to Xcompact3d(that being said I have used incompact2d code given to me by my senior for 2 months), I would like to know about the capabilities of this newer code.

Background on my problem: I am presently trying to run a DNS simulations matching an experimental investigation of a flow through adverse pressure gradient created by a contoured upper wall.

Instead of running a DNS simulation with contoured body placed in the upper boundary, I reasoned that by taking the experimental velocity distribution created by the body(in the invisicd region), and applying it as a boundary condition, I could reduce the computational domain size.

My question: Is there a provision to apply two different boundary conditions in the same directions(please see figure), i.e

• 1.streamwise-velocity distribution boundary condition and no-slip boundary condition(both on x-z plane).
• 2.F-S type velocity inlet profile and convective outlet (both on y-z plane) .

Thank you for your time and consideration.

[slaizet]

Hi,
The answer is yes. You just need to use ncly1=nclyn=2 (to allow for Dirichlet BC for the velocity) and then you just need to input the relevant BC subroutine (I guess in your case subroutine boundary_conditions_tbl (ux,uy,uz,phi)). I think you only need to change the top BC.
Best wishes,
Sylvain

[Flyingsai]

Thank u so much sir, I will try to implement it.

[Flyingsai]

Sir, does the code have the capability to create a free-slip contoured body (here on the upper domain), from my understanding incompact2d does not have this capability, please see the figure below.

[slaizet]

Hi,
The computational domain needs to be a rectangle but it should be possible to impose a customised BC mimicking the set-up in the figure.
Best,
Sylvain