[J_student]

I am also trying to attain a pressure vs time graph however when i follow CeesH's steps and try to make the point surface in fluent the following error comes up.

Error: Surface creation failed!

Error Object: #f

I'm new to fluent can someone please tell me how to resolve this issue

Thanks in advance

[J_student]

I am also trying to attain a pressure vs time graph however when i follow CeesH's steps and try to make the point surface in fluent the following error comes up.

Error: Surface creation failed!

Error Object: #f

I'm new to fluent can someone please tell me how to resolve this issue

Thanks in advance

[nwadikeamarachukwu@yahoo.]

Originally Posted by CeesH

Before running your simulation, go to monitors > volume monitors or surface monitors > set up a monitor point on the desired location > make sure you select "write to file" and set the desired axis values (iterations, time-steps or flow-time).

Volume monitors should be used if you want to know your value in a whole domain, or a part of the domain volume; so for pressure: if you want to know the average value over the whole domain.

Surface monitors should be used if you want to know the value on a plane, line or point. For pressure, you may want to know the surface-average value on a wall, or for a point, the vertex-average value. For this, you need to set up a new surface > point and enter the desired coordinates.

I am a new beginner in fluent. I saved my calculation activities in ASCII file which i created under Autosave Every(Time Steps). But when i opened it in excel, i could not see a column for time. All i saw was column for x,y coordinate and pressure coefficient.
Please i will appreciate if you will make it more elaborate to me on how to plot a graph of pressure against time. Am working on flow around high speed train in transient steady using inviscid solver.
Thanks for your human kindness.

[mahayheidari]

how can i plot veloocity vs time?
please help me

[mahayheidari]

Originally Posted by grisu
;154228

Correct - otherwise you have to use your saved files, load all of them using a script and process them, writing the results to files which you can combine.

how can i plot veloocity vs time?
please help me

[mahayheidari]

how can i plot veloocity vs time?
please help me

[enayath]

Describe your problem better!
If you are using a steady state model, there is no time.
If you are using a transient model, simply go to "Graphics" and plot your simulation for a specific time.
If you wanna plot one variable as a function of time (which I think you want) you have 3 ways:
1- save the cas/dat file every time step( or every 2,3,...) and then open them via another program like Tecplot
2-You can set up an animation BEFORE running your transient simulation via "solution animations"
3- You can also save your data (variable and time step) via a ".out" file in "surface monitors" and then open it in Excel

Good luck,
Hooman

[mahayheidari]

Originally Posted by enayath

Describe your problem better!
If you are using a steady state model, there is no time.
If you are using a transient model, simply go to "Graphics" and plot your simulation for a specific time.
If you wanna plot one variable as a function of time (which I think you want) you have 3 ways:
1- save the cas/dat file every time step( or every 2,3,...) and then open them via another program like Tecplot
2-You can set up an animation BEFORE running your transient simulation via "solution animations"
3- You can also save your data (variable and time step) via a ".out" file in "surface monitors" and then open it in Excel

Good luck,
Hooman

hello
thanks for your reply
can you explain third number more( step by step ).
because in surface monitor i cant have exact velocity in report type.I have average or max ,....

[enayath]

It depends on the type of information you would like to have, velocity of a point, average velocity on a line or a surface...based on that, choose the appropriate type ( like vertex average or area-weighted), select the point or surface or area,... and then run your simulation...for the detailed information, you need to read the Ansys Fluent Theory Guide ...

Good luck,
H

[mahayheidari]

Originally Posted by enayath

It depends on the type of information you would like to have, velocity of a point, average velocity on a line or a surface...based on that, choose the appropriate type ( like vertex average or area-weighted), select the point or surface or area,... and then run your simulation...for the detailed information, you need to read the Ansys Fluent Theory Guide ...

Good luck,
H

if i want velocity of a point which is better to select
excuse me

[niazgdc]

i hAve don transient simulations for 3 minutes and i have set monitors ,can i get concentration versus time graph in post processing? thanks in advance for help