CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

Some questions about working in Ansys

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 27, 2019, 08:21
Default Some questions about working in Ansys
  #1
New Member
 
Valera
Join Date: Dec 2018
Posts: 27
Rep Power: 7
looee is on a distinguished road
Hi Everyone!

I have some questions about Ansys:
1) Can I work in Ansys table like in Excel? For example, what should I write in B32 cell to calculate it as =B31*(B28-B29)
2) In my work i have pipe counter heat exchager. I want to caclucale the total heat, which is transfered from hot water to cold through the pipe. To do this I've calculated the average heat flux through the pipe interface and multiply it to its area. But can I calculate it in one step? I didn't find corresponding function.
3) What should I do to change the temperature unit [K] to [C]? I changed it in the “variables” window, so the results in the chart (for example) are displayed in [C], but [K] still remains in the table
Attached Images
File Type: jpg Quest.jpg (142.1 KB, 22 views)

Last edited by looee; April 27, 2019 at 14:53.
looee is offline   Reply With Quote

Old   April 28, 2019, 19:53
Default
  #2
New Member
 
Tomer Simhony
Join Date: Dec 2018
Posts: 7
Rep Power: 7
FluidViscosity is on a distinguished road
To answer two of your questions:

1) Yes and no. Have a play with it and you will quickly see its limitations. To my knowledge you cannot reference other cells, but only expressions, variables, locations etc. To achieve what you want instead write something like =massflowinlet*(enthalpyinlet-enthalpyoutlet) if you are using expressions. Otherwise the full expression using functions.

3)You can edit the units by going Edit/Options/Units in CFD Post, or changing your solution units before the solve in CFX Pre. E.g. change these in your .ccl:
FLOW: Flow Analysis 1
SOLUTION UNITS:
Angle Units = [rad]
Length Units = [m]
Mass Units = [kg]
Solid Angle Units = [sr]
Temperature Units = [K]
Time Units = [s]
END
FluidViscosity is offline   Reply With Quote

Old   April 29, 2019, 10:54
Default
  #3
New Member
 
Valera
Join Date: Dec 2018
Posts: 27
Rep Power: 7
looee is on a distinguished road
Thank you for advice!
But in Edit/Options/Units in CFD Post there is no choice between [C] and [K]. Just only [K]
Attached Images
File Type: jpg question.jpg (102.7 KB, 5 views)
looee is offline   Reply With Quote

Old   April 29, 2019, 18:18
Default
  #4
New Member
 
Tomer Simhony
Join Date: Dec 2018
Posts: 7
Rep Power: 7
FluidViscosity is on a distinguished road
Almost there!
You simply need to change the system from SI units to 'custom' to allow the temperature unit to be in degrees Celsius.

CFD_units.png

Last edited by FluidViscosity; April 29, 2019 at 18:19. Reason: Clarity
FluidViscosity is offline   Reply With Quote

Old   April 30, 2019, 08:57
Default
  #5
New Member
 
Valera
Join Date: Dec 2018
Posts: 27
Rep Power: 7
looee is on a distinguished road
Oh, exactly. But in chart it's still remaning [K]
looee is offline   Reply With Quote

Old   April 30, 2019, 17:50
Default
  #6
New Member
 
Tomer Simhony
Join Date: Dec 2018
Posts: 7
Rep Power: 7
FluidViscosity is on a distinguished road
Strange. For me it automatically updates when I hit Apply/OK. Try right clicking 'Chart 1' in the outline and selecting refresh preview. If that still doesn't work, I would export the data as a csv and change it manually.

File/Export/Export...
FluidViscosity is offline   Reply With Quote

Old   May 2, 2019, 03:53
Default
  #7
Member
 
Frank Weise
Join Date: Mar 2009
Location: Germany
Posts: 55
Rep Power: 17
FrankW is on a distinguished road
You can also change the units at the Variables Tab.
Attached Images
File Type: jpg Temp1_cr.jpg (67.9 KB, 4 views)
FrankW is offline   Reply With Quote

Old   May 2, 2019, 05:25
Default
  #8
New Member
 
Valera
Join Date: Dec 2018
Posts: 27
Rep Power: 7
looee is on a distinguished road
Yes, I mentioned above about it. Nonetheless units haven't change in the Table, although it works for all others (for the countours and for the Charts)

Thank you)
looee is offline   Reply With Quote

Old   May 2, 2019, 05:37
Default
  #9
New Member
 
Valera
Join Date: Dec 2018
Posts: 27
Rep Power: 7
looee is on a distinguished road
Quote:
Originally Posted by FluidViscosity View Post
Strange. For me it automatically updates when I hit Apply/OK.
I confused Table with Chart. In the Chart it works, but in the table units haven't changed
looee is offline   Reply With Quote

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ansys WB has stopped working geethu ANSYS 3 November 1, 2017 15:12
A CFX-POST error (ver 14.5.7) wangyflp88 CFX 2 July 22, 2017 01:17
ansys help viewer has stopped working haydaraslanersin ANSYS 0 June 21, 2016 10:14
How to reset the defulat layout of Ansys working bench jatin1990 ANSYS 1 August 27, 2014 03:57
ANSYS program has stopped working? chihoangkt ANSYS 0 July 16, 2012 17:41


All times are GMT -4. The time now is 19:28.