|
[Sponsors] |
February 27, 2019, 21:09 |
|
#21 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,697
Rep Power: 143 |
The FAQ talks about much more than just time step size. And anyway, do you need a time step smaller than 0.0001?
Also, have you turned off surface tension as I recommended? And what are you trying to model anyway, and why do you want to model it?
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
|
February 28, 2019, 18:39 |
|
#22 |
New Member
Seleccionar
Join Date: Feb 2019
Posts: 18
Rep Power: 7 |
Well the total purpose, is to obtain the base shear generated by the movement of the fluid contained in free surface. That's all, but it seems that I've done it very complicated.
If I have reduced the time steps and now nothing works. |
|
February 28, 2019, 19:24 |
|
#23 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,697
Rep Power: 143 |
Again, the FAQ talks about much more than just time step size. Please make sure you read it and consider what it says or you are wasting everybody's time.
Please upload your output file. (As an attachment to the forum, not as a third party download link)
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
|
March 12, 2019, 16:49 |
|
#24 |
New Member
Seleccionar
Join Date: Feb 2019
Posts: 18
Rep Power: 7 |
How can I measure the maximum water level using a tool, I would prefer not to have to use only the view I have already managed to create my model, I am in the stage of data refinement |
|
March 13, 2019, 04:21 |
|
#25 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,697
Rep Power: 143 |
In CFD-Post:
* Make an isosurface at volume fraction = 0.5 * Colour the isosurface by height (I assume that is y) * Set the scale to local and the top of the scale is your peak height. Or you can use the function calculator and the maxVal(y) function.
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
|
March 14, 2019, 01:18 |
|
#26 |
New Member
Seleccionar
Join Date: Feb 2019
Posts: 18
Rep Power: 7 |
Thanks for the previous answer I have generated the movement of the water in the tank with ovoid geometry, which is my objective of study. Now I am looking for a way to find the time in which I must execute the simulation because the design codes use analytical expressions that use an acceleration to determine a horizontal force on the structure, but not the time when this acceleration acts on the structure . How can I find this time? |
|
March 14, 2019, 01:26 |
|
#27 |
New Member
Seleccionar
Join Date: Feb 2019
Posts: 18
Rep Power: 7 |
I also have two concerns,
if the horizontal acceleration is set to (General-setup), then this acceleration would act on the mass of contained air and water, then, how the behavior of my fluid affects the fact that the air mass is accelerated. The second is, when configuring the cover as a pressure outlet, there would be compression of my air mass due to the movement of the fluid because the upper entrance has a smaller diameter than the rest of my structure, promoting the compression of the air. |
|
March 14, 2019, 04:48 |
|
#28 | ||
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,697
Rep Power: 143 |
Please post the equations you are trying couple to.
Quote:
Quote:
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
|||
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
water sloshing in oscillating tank (problem using udf Define_ZONE_MOTION) | Tamsu | Fluent UDF and Scheme Programming | 8 | November 24, 2021 00:11 |
Wind shear effect on water level | wouterremmerie | OpenFOAM Pre-Processing | 4 | December 28, 2020 16:01 |
No liquid water exist in my Fuel Cell simulation | fatchang | FLUENT | 19 | October 15, 2018 14:27 |
[GAMBIT] Water Slosing in Water Tank | iwan | ANSYS Meshing & Geometry | 4 | October 17, 2013 18:25 |
Short circuit between transistors by water sloshing | Roland R | CFX | 4 | October 3, 2013 09:07 |