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-   -   Temperature profile of a cylindrical wall in CFX (http://www.cfd-online.com/Forums/cfx/90538-temperature-profile-cylindrical-wall-cfx.html)

safikhani_hamed July 13, 2011 09:29

Temperature profile of a cylindrical wall in CFX
 
1 Attachment(s)
Dear friends,
In fact I want to use a special temperature profile at a cylindrical wall in CFX (as shown in attached file). Can any body help me please to do that ? in there any tutorial or document ?

Sincerely

Abou ali July 13, 2011 11:32

Hi
It is easy to define the temperature variation vs a distance by using a function in CFX-Pre.

safikhani_hamed July 13, 2011 12:08

Temperature Profile
 
Dear Abou Ali,
Thank you very much, but my problem is that the wall is rounded and not straight, have you any document to send me please ?

Abou ali July 13, 2011 12:32

Hi,
If you need documentation about CFX-Pre Function you can find it in the CFX Help. You can see also tutorial 19 Air Conditioning Simulation (CFX 13).

Hamilton July 15, 2011 04:58

CFX Tutorial
 
There are some exampls in the cfX tutorial about functions. you can use them.

safikhani_hamed July 20, 2011 01:04

Dear Abou Ali
In fact I read the mentioned tutorial, but in that example show using the functions in CFX but has not explain how can write a function. Do you know how can I write a function to show for example a linear temperature profile ?

Sincerely

Abou ali July 21, 2011 08:20

Hi,
This is the procedure to create and use a function in CFX Pre.
The function is T=f(x) and the known data are:
T1 at x1
T2 at x2
T3 at x3
The units of T and x are K and m respectively

Procedure
1- From the main menu, select Insert > Expressions, Functions and Variables >
User Function
.
2- In the New Function dialog box, type Tempx.
3- Click OK.
The details view for the Tempx function is displayed.
4- In the Argument Units box type [m]
5- In the Result Units box type [K]
6- Set Option to One Dimensional
7- In the Coordinate box type x1
8- In the Value box type T1
9- Click Add
10- Repeat steps 7 to 9 to add x2,T2 and x3,T3.
11-Click OK
*****************
From the main menu, select Insert > Expressions, Functions and Variables >
Expression.

2. In the New Expression dialog box, type Tx.
3. Click OK.
The details view for the Tupper equation is displayed.
4. Under Definition, type Tempx(x) .
5. Click Apply to create the expression.
The expression is added to the list of existing expressions.


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