|
[Sponsors] |
how to get the stream tube of waterjet inlet in the whole flowfield? |
![]() |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
![]() |
![]() |
#1 |
New Member
Wang Chao
Join Date: Jul 2012
Location: China
Posts: 8
Rep Power: 14 ![]() |
As the title said, I have simulated the flowfield of a waterjet inlet. Some water of the whole flow field flow into waterjet inlet. I want to get the stream tube of the water that flow into waterjet in the whole flowfield. How to do it by CFX-post? Who can help me, THANKS.
|
|
![]() |
![]() |
![]() |
![]() |
#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,972
Rep Power: 145 ![]() ![]() ![]() ![]() |
You can approximate this by using a series of streamlines around the outside of the stream tube. Integrate them backwards from your outlet to see where they came from.
|
|
![]() |
![]() |
![]() |
![]() |
#3 |
New Member
Wang Chao
Join Date: Jul 2012
Location: China
Posts: 8
Rep Power: 14 ![]() |
Look at the picture below. The streamline thrill through the plane and into the waterjet inlet. I want to get the inlet surface on the plane that just the streamline thrill through it. Would you like to tell me the detail approach?
![]() |
|
![]() |
![]() |
![]() |
![]() |
#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,972
Rep Power: 145 ![]() ![]() ![]() ![]() |
What you have already done is about right. You can see the stream tube from that.
If you want to define a surface to bound it you are going to have to take a different approach. You need to "tag" the inlet water somehow. If it is a different temeprature or composition then it is easy. If not you need to add a convected AV which separates the inlet water from the other. Then you can draw an isosurface of the AV to define your stream tube. |
|
![]() |
![]() |
![]() |
![]() |
#5 |
New Member
Wang Chao
Join Date: Jul 2012
Location: China
Posts: 8
Rep Power: 14 ![]() |
Thanks, I will try to do it.
|
|
![]() |
![]() |
![]() |
![]() |
#6 | |
New Member
Wang Chao
Join Date: Jul 2012
Location: China
Posts: 8
Rep Power: 14 ![]() |
Quote:
|
||
![]() |
![]() |
![]() |
![]() |
#7 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,972
Rep Power: 145 ![]() ![]() ![]() ![]() |
Of course, the tagged water just flows out of the outlet so no boundary condition needs specification for it at the outlet. This is a different approach to getting your stream tube. Draw an isosurface of the additional variable and you will have your stream tube.
|
|
![]() |
![]() |
![]() |
![]() |
#8 | |
New Member
Wang Chao
Join Date: Jul 2012
Location: China
Posts: 8
Rep Power: 14 ![]() |
Quote:
|
||
![]() |
![]() |
![]() |
![]() |
#9 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,972
Rep Power: 145 ![]() ![]() ![]() ![]() |
No, I do not have time. There a lot of tutorials which come with CFX so I recommend you work your way through them. They show most of the features of the software.
|
|
![]() |
![]() |
![]() |
![]() |
#10 |
New Member
Wang Chao
Join Date: Jul 2012
Location: China
Posts: 8
Rep Power: 14 ![]() |
||
![]() |
![]() |
![]() |
Tags |
water jet |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
fully developed velocity profile in 3D | S.S. | Main CFD Forum | 14 | January 11, 2017 13:06 |
How to set up the inlet boundary condition for a low pressure case? | beastieboys6 | FLUENT | 3 | April 10, 2012 22:46 |
simpleFoam Blows up with Parabolic Inlet Pipe Flow | swahono | OpenFOAM | 0 | December 6, 2010 19:37 |
Inlet diffuser of ramjet | Mohammad Kermani | Main CFD Forum | 25 | December 29, 2000 18:46 |
length scales at inlet for internal flows | Anne-Marie Giroux | Main CFD Forum | 3 | July 5, 1999 21:28 |