Could someone tell me what boxToCell means
 

I get one queation in the dambreak tutorial of interFoam.
The setFieldsDict are shown below:
regions
(
boxToCell
{
box (0 0 -1) (0.1461 0.292 1);

fieldValues
(
volScalarFieldValue gamma 1
);
}
);


What does "box (0 0 -1) (0.1461 0.292 1)" mean?

In this case ,I don't see anything related to (0 0 -1) and (0.1461 0.292 1).
Could anyone help me,thanks?

It specifies two opposite poin
 

It specifies two opposite points of a box. All cells within that box are selected. It is used to set the void fraction gamma, in order to pile up a lot of water to be splash around.

markus

"box (0 0 -1) (0.1461 0.292 1)
 

"box (0 0 -1) (0.1461 0.292 1)"
defines a rectangular prism aligned with the coordinate system with one point (minimum x, y and z) at (0 0 -1) and another point (maximum x, y and z) at (0.1461 0.292 1).

Thank you all. But something c
 

Thank you all. But something confused me is why is "box (0 0 -1) (0.1461 0.292 1)" in this case.
eg:
convertToMeters 0.146
0.1461*0.146=0.0213 is not the physical size of water column.
So does 0.292,1,and -1.
Could anyone help me,thanks?

The 'convertToMeters' in block
 

The 'convertToMeters' in blockMeshDict is only used inside the 'blockMesh' mesh-generator. x=0.1461 and y=0.292 is the 'top-right' corner of the water column in physical space. The other coordinates are just chosen to be bigger for convenience

markus

Thanks,I already know it. Ther
 

Thanks,I already know it. There is a geometry figure in the uer guide U-55, it is different with the simulated case. So I am just a little confused. Thank you.

Please could you tell me how can i set the makeCellSets file "boxToCell" is case?

Thank you in advance

Zmin y Zmax
 

I have a question. Why the zmin is -1 and zmax is 1?. Thanks

Questions about SetFields
 

I have 2 questions about setFields. I was partially answered based on the the following post:

http://www.cfd-online.com/Forums/ope...ell-means.html

However, my questions are:

1- How the minimum and maximum corners are determined?

2- Why zmin and zmax are -1 and +1, as exactly the last forumer aske?

I appreciate if you help me,

Parisa

Quick answer, based on previous answers of mine:

1. Quote:

   Originally Posted by wyldckat (Post 457771) Have a look into this file: https://github.com/OpenFOAM/OpenFOAM...et/topoSetDict You can find it on your system by running: Code: find $FOAM_UTILITIES  -name topoSetDict But keep in mind that if your internal mesh isn't already cut into the shape of the sphere, then all you get is a selection of the cells that are inside the sphere selection.

2. Quote:

   Originally Posted by wyldckat (Post 353511) It's simple: setSet and topoSet are basically selection tools that can select parts of the mesh, including points, faces and cells. Once you select parts of the mesh and assign each selection a "tag" (i.e. a "set"), then you can do something with that "tag".

3. See also: http://www.cfd-online.com/Forums/ope...tml#post460374 - post #4

add boxtoCell
 

Hello ,
i need help regarding those 2 lines
what is the difference between add and new , and is it true that openFoam no longer use cellSet should i replace it with something else ?

cellSet refine new
cellSet refine add boxToCell (0.0 0.0 0.0) (0.584 0.146 0.584)
cellSet refine new boxToCell (0.0 0.146 0.0) (0.548 0.292 0.584)


Thank you

Quick answers:

• "new" is for creating a new set.
• "add" is to add more items to the existing set.

You're mixing up two things:

1. There was an application named "cellSet" in older versions of OpenFOAM.
2. The current setSet application has a command named "cellSet", which is still working. The lines you pointed out should work within setSet.

For more details: http://openfoamwiki.net/index.php/SetSet#Usage_example

Thank you very much i am now able to refine the region i wanted !

Hello Foamers,

I want to ask if there is a way i can code a cylinderTocell field to oscillate.
Indeed, I created cylinderTocell field using topoSetDict, I want to know it can be put in motion.
I have seen in interFoam tutorials, setFieldsDict is used to give a linear velocity to a boxtocell Field. Is it posible to give it also an oscillating velocity?

Please help me to find out if there is a way this cylinderTocell Field can be moved(oscillating motion).

my ultimate goal is to simulate flow over that cylinder? (stationary and oscillating).
I thought that cylinder will be immersed not body fitted? Does it sound feasible?

I will be happy to hear from you.


Regards!