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Forum: Main CFD Forum

January 14, 2024, 15:31

Replies: 10

FVM; incompressible fluid, staggered grid, gravity problem

Views: 345

Posted By Mathematician

thanks for your answer. So the gravity problem...

thanks for your answer.
So the gravity problem must be compressible(single phase in vacuum)? I noticed that the eulerian coordinate density rho(position, time) would not be constant since the fluid...

Forum: Main CFD Forum

January 14, 2024, 07:32

Replies: 10

FVM; incompressible fluid, staggered grid, gravity problem

Views: 345

Posted By Mathematician

No I was talking about an initially computational...

No I was talking about an initially computational grid that is empty ( no air, void), but then there's the fluid inlet that "fills" the grid within time

Forum: Main CFD Forum

January 14, 2024, 07:10

Replies: 10

FVM; incompressible fluid, staggered grid, gravity problem

Views: 345

Posted By Mathematician

Here's a similar problem to understand my...

Here's a similar problem to understand my doubt(how do you simulate a fluid if the fluid is not intiially everywhere on the grid and so you can't solve everywhere on the grid, but maybe..)
I have a...

Forum: Main CFD Forum

January 13, 2024, 08:28

Replies: 10

FVM; incompressible fluid, staggered grid, gravity problem

Views: 345

Posted By Mathematician

problem is my cell is 2d. If I solve everywhere...

problem is my cell is 2d. If I solve everywhere it's like just a fluid being costantly "pushed" by a constant force. but my fluid is initially at the top and then falls and bounces

Forum: Main CFD Forum

January 12, 2024, 13:17

Replies: 10

FVM; incompressible fluid, staggered grid, gravity problem

Views: 345

Posted By Mathematician

I did like that; I did like this; after a...

I did like that; I did like this; after a timestep (choosen so that the simulation is stable) I predict the velocity and then I make move the fluid in the new cells (by allowing the approximation of...

Forum: Main CFD Forum

January 12, 2024, 12:07

Replies: 10

FVM; incompressible fluid, staggered grid, gravity problem

Views: 345

Posted By Mathematician

FVM; incompressible fluid, staggered grid, gravity problem

My problem is to simulate an incompressible fluid with certain cinematic viscosity in a staggered grid with ghost cells, and the computational domain looks like this; 98049
:confused::eek:

but...

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