|
[Sponsors] |
June 22, 2011, 03:37 |
gradient of total pressure
|
#1 |
New Member
Join Date: Jun 2011
Posts: 14
Rep Power: 14 |
Gents,
I have a question regarding Paraview. I would like to generate a variable "gradient of total pressure" from cell to cell (or node to node) Has anyone experience with that? I think this could be usefull to show, where in the system the biggest pressuredrops are placed. Thanks for your help Cheers, Dito |
|
August 2, 2011, 09:27 |
|
#2 | |
New Member
CFD user
Join Date: Apr 2010
Location: Germany
Posts: 28
Rep Power: 15 |
Hi Dito,
I want to generate the same result. Did you find out how can paraview do that? Regards, Subhkirti. Quote:
__________________
Thanks, |
||
August 3, 2011, 02:33 |
|
#3 |
New Member
Join Date: Jun 2011
Posts: 14
Rep Power: 14 |
Yes, this was easier as expected
There ist a standardfilter called "Gradient of unstructured Dataset" ) Just mark the Volume -> click on the filter and choose the variable from which you wanna create the gradients. -> In this case Ptot Works fine. Cheers DITO |
|
August 3, 2011, 04:13 |
Gradient of Unstructured Datasets
|
#4 | ||
New Member
CFD user
Join Date: Apr 2010
Location: Germany
Posts: 28
Rep Power: 15 |
Thanks Dito,
I found the Gradient of Untrstructured Datasets yesterday, but I want not able to get to sensible results due to the following. Quote:
click on the filter and choose the variable from which you wanna create the gradients. Quote:
__________________
Thanks, |
|||
August 3, 2011, 04:38 |
|
#5 |
New Member
Join Date: Jun 2011
Posts: 14
Rep Power: 14 |
With switching the Geo Representation to volume, Paraview is doing s.th. like volume rendering. This needs a lot of recources.
With volume, I meant the volume in your pipeline browser. Just mark it and click on the filter. Than select the specific variable. Paraview will create a new part in your pipeline browser eg. GradientOfUnstructuredDataSet1. This part, you can use as the source for clips, streamlines and so on. The clip or streamline you can colour with the new gradient variable. Reg. Ptot. this is an exported variable out of your solver. I think you forgot to export it. I have also a question. maybe you have some experience with clipping. I would like clip a specific section of my model with the planetool. Not the whole domain. How can I do this? any Idea? And if it is possible, can I move the plane orthogonal to the plane Normal? I only managed to move it along the normal and resize the plane. Thx DITO |
|
August 9, 2011, 06:23 |
Paraview clip filter
|
#6 | |
New Member
CFD user
Join Date: Apr 2010
Location: Germany
Posts: 28
Rep Power: 15 |
Hi Dito,
Sorry for replying late. I did not understand your question fully, but it looks like you can use a box type in the clip filter to do that. Quote:
__________________
Thanks, |
||
August 9, 2011, 07:13 |
|
#7 |
New Member
Join Date: Jun 2011
Posts: 14
Rep Power: 14 |
thanks for reply.
no, this is not what I meant. when you use the planetool, you clipping the whole volume of your geometry. This is not what I want. I would like to create a clip not bigger as the planetool is. (implicit - explicit) Did you manage to get your gradientcoloured Streamline? DITO |
|
September 23, 2015, 13:01 |
|
#8 |
Member
António Pires
Join Date: Oct 2014
Posts: 33
Rep Power: 11 |
Hello everyone,
First of all, thanks for this thread, it was really helpful. I just have a question: I used the Gradient Of Unstructured data filter and chose the U field and i got a new item in the pipeline browser "GradientOfUnstructuredDataSet1". My question is how do i get the the results i need? how can i export them so i can make the data treatment i need for my work? Also, is it possible to get results from only a part of the geometry? or the only option is to get results for the whole geometry? Thanks, António |
|
September 27, 2015, 16:53 |
|
#9 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,974
Blog Entries: 45
Rep Power: 128 |
Greetings António,
It depends on the exact type of data extraction you're aiming for. But in any case, you can select any item from the "Pipeline Browser", then via menu "File -> Save Data" you can save the data to CSV (aka Comma Separated Values). Some examples of filters that might come in handy:
Bruno
__________________
|
|
September 28, 2015, 05:04 |
|
#10 |
Member
António Pires
Join Date: Oct 2014
Posts: 33
Rep Power: 11 |
Hi Bruno,
Thank you very much for your detailed answer, it will solve my question. Best, António |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Total pressure in rel frame and total pressure | Salut | CFX | 14 | May 8, 2023 02:29 |
Wind tunnel Boundary Conditions in Fluent | metmet | FLUENT | 6 | October 30, 2019 12:23 |
Difference between total pressure, total pressure in Stn and in Rel frames | turbo5 | CFX | 6 | January 21, 2016 16:05 |
Star cd es-ice solver error | ernarasimman | STAR-CD | 2 | September 12, 2014 00:01 |
pressure gradient term in low speed flow | Atit Koonsrisuk | Main CFD Forum | 2 | January 10, 2002 10:52 |