Visualizations of water

lkk_12342001 · November 7, 2020, 5:49am

Hi, I try to follow the same steps for visualizing the water surface.
However, the quality is not that great compare to your rendered results.
It seems more transparent in my case.

Did I miss any step?

Use “Clip” to select a Scalar value for alpha.water.
Apply “Extract Surface” to the “Clip” volume
Apply “Generate surface normals” to the “Extract Surface”
Select the material of the “Generate surface normals” to water
Enable ray tracing with OSPRay pathtracer and Sample per pixels = 200

timofeymukha · November 9, 2020, 10:54am

Hi! It’s been a while since I did that one, but I think your summary is correct!

timofeymukha · November 9, 2020, 11:00am

Dear all, I get reports from pCloud that the dataset I shared gets a 1-10 downloads per week, which is more than I could imagine . In this light, I would like to point out that the data is provided via the CC BY 4.0 license. Also, you may want to take a look at the full dataset from our study: https://doi.org/10.6084/m9.figshare.12593480.v4
In particular, it includes series of vtk files with the evolution of the air-water interface. Can be used to create cool animations

mconti · November 11, 2020, 2:58pm

This is a really cool dataset, thanks for sharing Timofey. Messed around with it real quick testing out some of the new 5.9 OSPRay features.

This is just a quick 5 mins hack at it using the water velocity with a blue->white color gradient, but this simulation could be visualized in a REALLY cool way with some time spent setting it up.

@timofeymukha for that link you provided to the whole dataset. Are the files the full water tank like this one? Or just the top surface?

timofeymukha · November 11, 2020, 3:28pm

There is both. There are OpenFOAM cases on grids with varying density. These can be opened in Paraview to get the whole simulation domain, and a snapshot of the interface can be extracted along with the surrounding water, using the Clip function, as discussed above. But there is also an archive with a time-series of vtk files, which store the interface only. These can be used for an animation.

Kai_himself · October 8, 2021, 6:32am

Hey,
sorry, i know its an old topic, but my problem is very similar to the problems in the topic.
I would like to postprocess water, with “transparent” volume. To do that, i do a clip (Mode Scalar), Extract Surface and Generate Normals with PBR_Water. Ray Tracing (OSPRay raycaster) is enabled with 200 Samplings per Pixel. My water looks blue and not transparent like yours.
How do i set transparent to it ?

Best regards
Kai

mwestphal · October 8, 2021, 7:08am

FYI @timothee.chabat

mconti · October 8, 2021, 4:30pm

@Kai_himself the PBR_Water is a “water” texture that I created, and is essentially just putting an image of water at all of your surface cells. To get something transparent, either mess with the glass materials, or don’t use a material and just adjust color and opacity values.

Hope that helps

joeelrahi · December 10, 2021, 11:56am

Visualization of waves using paraview 5.9.1 !

Details: use PBR [material roughness=0, metallic=0.15] and play around with the color!

full video: Wave propagation rendering - YouTube

cory.quammen · December 10, 2021, 1:52pm

Joe, that’s a great video! Thanks for sharing. Could feature this video on paraview.org/gallery?

joeelrahi · December 10, 2021, 1:54pm

Hello Corry,

Thanks a lot! Please feel free to share the video! Would be a plus if I can add my affiliation on a first frame

kind regards,
Joe

cory.quammen · December 10, 2021, 2:03pm

Great, Joe! I’ll PM you with details.

joeelrahi · January 25, 2022, 11:08am

Hi all,

Here is another example of a wave basin with a regular wave field

OlivierM · June 5, 2023, 9:01am

Hello,
thanks a lot for sharing this.

How do you set the level of light reflection on the water surface, especially using the Glass_Water material ?

but this could also be:

How do you set no reflection of light on the surfaces surrounding the water ?

regards,
Olivier