[cramsdead]

Good morning everybody !

EDIT#3 : all I Need is some advise about my BC´s please !


I´m doing my master Thesis on this software.

My Topic is about create an RTM simulation and validate the best solver I can use with.

I created a tank (at the bottom), a tube and plate (at the top) which is my composite.

http://i.imgur.com/Z2wUMpW.png => global view
http://i.imgur.com/hPLnPAU.png => top view (Composite plate)
http://i.imgur.com/T5ID7Mx.png => top view zoom (Composite plate)
http://i.imgur.com/SyjQN9l.png => bottom view (tank)


The meshing is OK as the checkMesh.

What I would like to simulate is : resin in the tank (alpha1) and put pressure on the bottom of the tank (inletWall) (here 3bars) to inject my resin into the Composite plate.

When I set reverse gravity g(0 0 9.81) I can get kind of results I would like to have into the composite plate.

But to be closer the reality I set normal gravity (0 0 -9.81) and I have unexpeted result : MY FLUID RUN AWAY BY THE BOTTOM OF THE TANK to completly disappear! instead of being pushed by the pressure and go into the composite plate

I tried many times to change setting like BCs but nothing change or not like I want. (FLUID is still running away by the bottom of the tank)

I´m pretty sure my problem is due to bad BCs or may be the solver´settings
Before trying porousInterFoam, I´m using interFoam just to check the alpha1´s behavior.



I used to go on this usefull Forum to fix my problems, but this time I need to ask your help !

here my "0" files some from the "system" folder then the full folder.


ALPHA1 :

FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object alpha;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 0 0 0 0 0 0];
internalField uniform 0;
boundaryField
{ 
inletWall
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}
　
tankWall
{
type zeroGradient; //slip?
}
　
cylinderWall
{
type zeroGradient; //slip?
}
　
compositeWall
{
type zeroGradient;
}
　
outletWall //side composite wall
{
 
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}
　
}
// ************************************************************************* //

p_rgh :

FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object p_rgh;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [1 -1 -2 0 0 0 0];
internalField uniform 0;
boundaryField
{
inletWall
{
type fixedValue; 
value uniform 300000;
　
// type totalPressure;
// p0 uniform 0;
// U U;
// phi phi;
// rho rho;
// psi none;
// gamma 1;
// value uniform 300000; //-----------------------------------------
}
tankWall
{
type fixedFluxPressure;
value uniform 0;
}
cylinderWall
{
type fixedFluxPressure;
value uniform 0;
}
compositeWall
{
type fixedFluxPressure;
value uniform 0;
}
outletWall
{
type fixedValue; 
value uniform 0;
}
}
// ************************************************************************* //

U :

FoamFile
{
version 2.0;
format ascii;
class volVectorField;
location "0";
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 1 -1 0 0 0 0];
internalField uniform (0 0 0);
boundaryField
{
inletWall
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
tankWall
{
type fixedValue;
value uniform (0 0 0);
}
cylinderWall
{
type fixedValue;
value uniform (0 0 0);
}
compositeWall
{
type fixedValue;
value uniform (0 0 0);
}
　
outletWall
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
　
}
　
// ************************************************************************* //

EDIT #1 :
http://imgur.com/S5jJXAc actual simulation
http://imgur.com/WzacnsO expected
this difference is because the first one is not into a porous Zone.

EDIT #2 :
during Simulation there is an other stuff unexpected :
http://imgur.com/VTjR7rF

Looks like the fluid "splash" first on the Composite plate, creating lots of turbulences.

Do you think it is that?
May be is it better I try to start with the resin into the tube? or increase the pressure with the time, not 3 bars at the beginning (but I don´t know how to do)



I hope I have been clear about this post !
Can someone can show me or explain me how to fix up my problem?

Thank you very much.

[ARTem]

cramsdead, hello.
What about resin density?
If , then pressure isn't enough to lift heavy weight.

[cramsdead]

Hello ARTem and thank for your reply.

I managed to "push" my resin into my composite plate but the result still unexpected if we compare to the reality.

http://imgur.com/S5jJXAc actual simulation
http://imgur.com/WzacnsO expected

do you have any idea what Parameter I have to Play on to have something better?

Thank you.

[ARTem]

hello, cramsdead.

Is the mesh quality affects on your solution? Try coarser/finer one.

[cramsdead]

hello ARTem,

I don´t think the mesh quality really affect the results.

but first, can you validate my boundary conditions please?

Thank you