[lowlow]

Hi,everyone.
I'm a green hand in using OpenFOAM. These days I'm trying to simulate a rising bubble(2D) in a column of water by interFoam. The bubble rises from the bottom of the box and emerges from the water surface. It might be an easy task for you, but I have came up against several problems. Could you help me?
1. According to my results, the bubble floats to the left of the column and stops at the top. But in my imagination, the bubble should blow up and disappear into the air. I think maybe my OUTLET's BC has effects on the water flow. So is there anyting wrong with my OUTLET's BC.
2. I use setFields(sphereToCell) to make a bubble in the water. It works. And then I try to create an area full of air above the water surface. So I edit my setFieldsDit in the same way. As shown below.

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.3.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "system";
object setFieldsDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

defaultFieldValues
(
volScalarFieldValue alpha.water 1
);

regions
(
boxToCell
{
box(0 0.025 0)(0.015 0.03 0.0001);

fieldValues
(
volScalarFieldValue alpha.water 0
);
}
sphereToCell
{
centre (0.0075 0.002 0.0001);
radius 0.001;

fieldValues
(
volScalarFieldValue alpha.water 0
);
}
);

// ************************************************** *********************** //

When I run the setFields, it seems that the program does't buy it. The terminal shows as follows. It looks like I use the boxToCell in an improper way. I have no idea how to set an air-area above the water then.

Create time

Create mesh for time = 0

Reading setFieldsDict



--> FOAM FATAL IO ERROR:
"ill defined primitiveEntry starting at keyword 'regions' on line 24 and ending at line 48"

file: E:/OpenFOAM/cygwin64/home/Bob/OpenFOAM/Bob-2.3.x/run/FoamCases/bubble/case22/system/setFieldsDict at line 48.

From function primitiveEntry::readEntry(const dictionary&, Istream&)
in file lnInclude/IOerror.C at line 132.

FOAM exiting

All the files is uploaded, anyway, thanks for your attention and wait for your help. QAQcase23.zip

[kmefun]

box(0 0.025 0)(0.015 0.03 0.0001);
^
box (0 0.025 0)(0.015 0.03 0.0001);
with space

[lowlow]

Originally Posted by kmefun

box(0 0.025 0)(0.015 0.03 0.0001);
^
box (0 0.025 0)(0.015 0.03 0.0001);
with space

Thank you I hv figured out the problem. OUTLET is incorrect in U file.