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Search: Posts Made By: Ahmed Khattab
Forum: OpenFOAM August 21, 2014, 12:37
Replies: 2
Views: 175
Posted By Ahmed Khattab
thanks elvis, for your reply, really appreciated.

thanks elvis, for your reply, really appreciated.
Forum: OpenFOAM August 16, 2014, 23:13
Replies: 2
Views: 175
Posted By Ahmed Khattab
mass transfer in OpenFOAM

Dear foamers,

i want to simulate a case of flowing of two solutions separated by membrane, it is well knon that there is analogy between heat and mass transfer, so i can use a solver which...
Forum: OpenFOAM Installation July 29, 2014, 14:30
Replies: 1
Views: 112
Posted By Ahmed Khattab
configuring OpenFOAM after updating of UBUNTU

Dear All,

could i reconfigure OpenFOAM after updating UBUNTU or i must reinstall it from the beginning.

thanks,
Forum: OpenFOAM February 24, 2014, 07:49
Replies: 1
Views: 157
Posted By Ahmed Khattab
i figured out the answer, the conduction...

i figured out the answer, the conduction coefficient is calculated from the transport model of sutherland. if the model is changed the conduction coefficient must be entered.

thanks,
Forum: OpenFOAM February 23, 2014, 16:43
Replies: 1
Views: 157
Posted By Ahmed Khattab
rhoPorousMRFSimpleFoam

Dear All,

i noticed that rhoPorousMRFSimpleFoam can simulate heat transfer for flow through porous media, but i can't find any entry defines conduction coefficient or diffusion coefficient in...
Forum: OpenFOAM January 11, 2014, 15:18
Replies: 6
Views: 340
Posted By Ahmed Khattab
Hi Tobias, i want to use one fluid region...

Hi Tobias,

i want to use one fluid region and no solid regions, cht don't accept this. splitMeshRegions doesn't create mesh for only one region. also, cht must read regions to apply suitable...
Forum: OpenFOAM January 7, 2014, 09:05
Replies: 6
Views: 340
Posted By Ahmed Khattab
Hi Tobias, 1- how could i use...

Hi Tobias,

1- how could i use chtMultiRegionSimpleFoam for one region?

2- i think buoyantSimpleFoam is used for natural convection not forced convection. also, all thermo models available with...
Forum: OpenFOAM January 6, 2014, 15:08
Replies: 6
Views: 340
Posted By Ahmed Khattab
convection heat transfer in one region

Dear All,

i want to simulate convection heat transfer for flow exposed to constant wall temperature without including tube thickness. my problem is chtMultiRegionSimpleFoam is used for multiple...
Forum: OpenFOAM Native Meshers: blockMesh January 6, 2014, 12:44
Replies: 5
Views: 397
Posted By Ahmed Khattab
Dear Kannan, i think i didn't catch your...

Dear Kannan,

i think i didn't catch your idea, could you please send me example for this mesh.

BR,
Ahmed
Forum: OpenFOAM December 23, 2013, 13:57
Replies: 0
Views: 179
Posted By Ahmed Khattab
chtMultiregionSimpleFoam with porous media

Dear Foamers,

i'd like to simulate a case using chtMultiRegionSimpleFoam, but i want to replace solid region by porous media.

can this done already by Openfoam solvers or i have to create a new...
Forum: OpenFOAM Pre-Processing November 8, 2013, 11:14
Replies: 6
Views: 383
Posted By Ahmed Khattab
Hi, i tried it but it didn't work with me....

Hi,

i tried it but it didn't work with me. beside, i have one region in my source and multiregions in my target.

thanks for your effort.
Forum: OpenFOAM Pre-Processing November 8, 2013, 06:23
Replies: 6
Views: 383
Posted By Ahmed Khattab
Hi, do you mean for example mapFields...

Hi,

do you mean for example
mapFields -targetRegion heater -targetRegion solid -tergetRegion air
Forum: OpenFOAM November 7, 2013, 07:51
Replies: 4
Views: 560
Posted By Ahmed Khattab
Hi, thanks for your reply, i already started...

Hi,

thanks for your reply, i already started new one.
http://www.cfd-online.com/Forums/openfoam/126041-mapfields-multi-regions.html

but this new thread is with another problem related to...
Forum: OpenFOAM Pre-Processing November 6, 2013, 17:32
Replies: 6
Views: 383
Posted By Ahmed Khattab
mapFields with multi regions

Dear All,

i want to use mapFields with multi Region target. i use openfoam2.1.0, which offers this option (-TargetRegion) for one region only.

can anyone help me?
Forum: OpenFOAM November 6, 2013, 11:13
Replies: 9
Views: 492
Posted By Ahmed Khattab
if you want to simulate natural convection, you...

if you want to simulate natural convection, you better use one of boussinesq solvers.
Forum: OpenFOAM Pre-Processing November 5, 2013, 17:31
Replies: 8
Views: 1,228
Posted By Ahmed Khattab
Did you compiled this utility after modification.

Did you compiled this utility after modification.
Forum: OpenFOAM November 5, 2013, 11:13
Replies: 9
Views: 492
Posted By Ahmed Khattab
for the tutorial case the heater havenít...

for the tutorial case the heater havenít homogeneous temperature. only one patch exposed to higher temperature then it heats up solid heater then air and other solids.
Forum: OpenFOAM November 5, 2013, 11:09
Replies: 4
Views: 560
Posted By Ahmed Khattab
Hi, i tried mapFields and i got this error...

Hi,

i tried mapFields and i got this error message

--> FOAM FATAL IO ERROR:
cannot find file

file:...
Forum: OpenFOAM November 5, 2013, 05:57
Replies: 9
Views: 492
Posted By Ahmed Khattab
Hi barbara, sorry to be late. you have...

Hi barbara,

sorry to be late. you have mistake in your makeCellSets.setSet in last line
cellZoneSet Air new setToCellZone bottomAir

you must change bottomAir to Air.

i didn't finished...
Forum: OpenFOAM October 28, 2013, 15:12
Replies: 9
Views: 492
Posted By Ahmed Khattab
Hi barbara, please send me your case files,...

Hi barbara,

please send me your case files, as attached or URL for dropbox.

thanks
Forum: OpenFOAM October 28, 2013, 15:11
Replies: 9
Views: 492
Posted By Ahmed Khattab
Hi barbara, i think temperature is fixed...

Hi barbara,

i think temperature is fixed for heater in tutorial case. it differ from patch to other but is fixed for each patch (simulate constant wall temperature).

i hope it helps you.
Forum: OpenFOAM October 26, 2013, 16:04
Replies: 1
Views: 382
Posted By Ahmed Khattab
doxygen for openfoam

HI All,

is this any difference setting up DOXYGEN in my pc and that available on line in this link http://www.openfoam.org/docs/cpp/

i mean difference in content not only formating.

thanks...
Forum: OpenFOAM October 25, 2013, 12:31
Replies: 4
Views: 560
Posted By Ahmed Khattab
groovy BC

Hi foamers,
i'm using groovy BC to express relation between pressure in two different patches. the problem is that expression takes average value of pressure in each patch and input it in my...
Forum: OpenFOAM October 25, 2013, 12:21
Replies: 9
Views: 492
Posted By Ahmed Khattab
Smile welcome barbara, actually you...

welcome barbara,





actually you didn't delete the condition of minY, i can see it in your file.another thing don't only delete it from your file because ".*" means put this condition for...
Forum: OpenFOAM October 24, 2013, 07:00
Replies: 6
Views: 419
Posted By Ahmed Khattab
Hi, thanks a lot for your mesh. it is quite...

Hi,

thanks a lot for your mesh. it is quite easier from mine. i make my mesh lick triangle cheese.
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