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-   -   SLIP BOUNDARY CONDITION (http://www.cfd-online.com/Forums/fluent/37648-slip-boundary-condition.html)

vas August 22, 2005 10:02

SLIP BOUNDARY CONDITION
 
hi, i want to do flow analysis using slip boundary condition. whether it is possible to do in FLUENT. whether fluent will support slip boundary?. if it is so, how can to do that. if anybody give suggestions regarding this,i am very thankful.

swarup August 22, 2005 10:42

Re: SLIP BOUNDARY CONDITION
 
Fluent supports slip boundary specification. See manual.


Manoj September 3, 2005 03:43

Re: SLIP BOUNDARY CONDITION
 
hi Thank but which chapter give me detail by


Swarup September 4, 2005 00:12

Re: SLIP BOUNDARY CONDITION
 
It is given in Chapter 7 on Boundary Conditions.

Swarup.

Ainee April 21, 2012 10:51

Mach number for slip condition
 
Hi;
I am trying to find out the mach number in a microscaled convergent divergent nozzle with slip boundary conditions and nitrogen as the working fluid using Fluent 6.2.16. But there is no option of Mach Number in fluent in this case. Kindly suggest me in this regard.
Thanx

LuckyTran April 21, 2012 17:45

Quote:

Originally Posted by Ainee (Post 356014)
Hi;
I am trying to find out the mach number in a microscaled convergent divergent nozzle with slip boundary conditions and nitrogen as the working fluid using Fluent 6.2.16. But there is no option of Mach Number in fluent in this case. Kindly suggest me in this regard.
Thanx

You need to calculate it from the information that fluent provides. Are you looking for Mach number over a cross section of the nozzle? If so, you need to calculate the bulk velocity and then use that to calculate Mach number.

Fluent is only a tool, it will not do all your work for you. You have to do some work also.

jpo April 24, 2012 17:30

To enable slip on any wall:

Go to "Boundary Conditions"
select the wall you want to set as slip wall
click "Edit"
under "Shear Condition" click "Specified Shear"
leave all entries equal to zero
click OK

LuckyTran April 24, 2012 17:38

Quote:

Originally Posted by jpo (Post 356740)
To enable slip on any wall:

Go to "Boundary Conditions"
select the wall you want to set as slip wall
click "Edit"
under "Shear Condition" click "Specified Shear"
leave all entries equal to zero
click OK

that question was answered all the way back in 2005.....

Ainee May 2, 2012 07:56

Thanks for your reply. You mentioned that a question was answered all the way back in 2005. Can you please tell me the link to that question & its solution? Moreover, I want to solve the same microscaled convergent divergent nozzle in COMSOL. Can you suggest me in this regard? I have no idea about COMSOL.

LuckyTran May 2, 2012 09:28

Quote:

Originally Posted by Ainee (Post 358847)
Thanks for your reply. You mentioned that a question was answered all the way back in 2005. Can you please tell me the link to that question & its solution? Moreover, I want to solve the same microscaled convergent divergent nozzle in COMSOL. Can you suggest me in this regard? I have no idea about COMSOL.

Hi please read the thread to answer your own question about answers to questions that are clearly in the same thread.

I would never recommend [the current] COMSOL so I do not have any suggestions on it. There's no practical fluid flow problem that can be done in COMSOL that can't be done better using ANSYS meshing & CFX or Fluent.

Ainee July 23, 2012 02:26

I am simulating a microscaled convergent divergent nozzle in ANSYS Fluent using nitrogen as the working fluid. The inlet pressure is 101325 Pa while Outlet pressure is 10 Pa. Inlet, exit and wall temperature is 300K. What type of density should I use? I am using sutherland law for the viscosity. Should I use temperature dependent Cp and thermal conductivity? Waiting for your reply.

Ainee August 6, 2012 06:36

Hi I want to compare my ANSYS Fluent Results with a paper. But there are two problems.
1. My mach number has a maximum value of 4.78 while in the paper it is 2.7
2. My mach number contours without slip are matching with the papers contours with slip.
I want to ask what type of density, thermal conductivity, Cp and viscosity should I use. Waiting for your quick reply


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