GAMBIT mesh please help me
 

Hello, I have rectangulaire room with a table, I want to mesh the volume without table,

I have create the volume of the room V1 then I have create the volume of the room V2 then V3=V1-V2,

I mesh V3 with tet hydrid,but when I want to export it I found ERROR : An incorrect mesh has been store... although my mesh has successfully done.

Where is the probleme ?

please helpe me.

Re: GAMBIT mesh please help me
 

take care that your v2 isn't still in your geometry. In the substract boolean operation, you have the possibility to retain (or not) the object with which you will substract. In other words look at you whole geometry, by shading it. YOu should have only one volume

Re: GAMBIT mesh please help me
 

HI mAx, thank you for your help,I will do what you had suggest to me.

now please, in bondary condition (always with GAMBIT) must I declare table's surfaces(as they belong to V3) like interface???? knowing that I have declared all the walls,the inlet and the outlet diffuser(I have a ventiled room).

I'm new in GAMBIT/FLUENT please enlighten me.

naus

Re: GAMBIT mesh please help me
 

It depends on what you will calculate. But anyway you can define the table sufaces as wall (but rename them with a special name, for distinguish them with default walls) After that you always can change the Boundary Conditions in Fluent. Important in Gambit ist that you distinguish your surfaces. Hope it helps

Re: GAMBIT mesh please help me
 

I will calculate the aeraulic flow around the table,

it is just to define all table surface's (at the same time) as interface in GAMBIT??

Re: GAMBIT mesh please help me
 

you can group the faces from the table as one entity. Then in Fluent you can compute what you want on this entity. explain why do you want to define your table as interface? Do you have conduction?

Re: GAMBIT mesh please help me
 

I define my table as interface beacause I have not data about it.and in BC (FLUENT)there is not data to define with this type. it is right?

Re: GAMBIT mesh please help me
 

if you only will to compute the force generated by the flow on the table, you have to set your table as wall

Re: GAMBIT mesh please help me
 

I set it as wall,you have right. When I export to FLUENT, I found this message of error: Error: access: unbound variable Error Object: phase-domain? it's a serious probleme??

Re: GAMBIT mesh please help me
 

phase-domain? are you working with multiphase?

Re: GAMBIT mesh please help me
 

if u do the tutorials here http://unix.eng.ua.edu/Fluent.Inc/tg...guide/tg03.htm

u will not have any problems with your case...

Re: GAMBIT mesh please help me
 

no I work only with the humid air in my conditionned room.

Re: GAMBIT mesh please help me
 

ok I got it. You certainly have one or more boundary name with a blank. for instance: WALL RED should be WALL_RED

Re: GAMBIT mesh please help me
 

thanks matt for tutorials.

Re: GAMBIT mesh please help me
 

thanks a lot mAx you are right, can you lighten me in FLUENT too! I will use in addition to model of energy the model of species because I would to display RELATIVE HUMIDITY and with this model I can, I have read it in chapiter 13 section 4, but I can't understand well how to do with mixture of dry air and h2o vapour(my fluid of interio is humid air).

Re: GAMBIT mesh please help me
 

i would advice you to do the tutorial about multiphase

Re: GAMBIT mesh please help me
 

j'ai du mal à m'exprimé en anglais!!

bj,comment je peus choisir les bonnes BC appropriée a mon cas, sachant que je suis en 3D avec un écoulement turb modele k-e, j'ai utilisé en plus de l'équation de l'énergie, le modele"specises",j'ai la convection naturelle dominante. merci.