[FLASH-USERS] FLASH VisIt Visualization - Question

[Dammati, Sai Sandeep]

Howdy!

Thanks for the suggestion but I am looking for a more GUI based rendering using VisIt (or) ParaView.


With Regards,
Sai Sandeep Dammati, Ph.D.,
Postdoctoral Research Associate,
School of Mechanical, Aerospace, and Manufacturing Engineering,
University of Connecticut,
Storrs, CT – 06269.

From: Ryan Farber <rjfarber at umich.edu>
Date: Thursday, July 11, 2024 at 17:57
To: Dammati, Sai Sandeep <saisandeepdammati at uconn.edu>
Cc: flash-users at flash.rochester.edu <flash-users at flash.rochester.edu>
Subject: Re: [FLASH-USERS] FLASH VisIt Visualization - Question
*Message sent from a system outside of UConn.*

Howdy :)

I'm not sure about visit.
But you can use yt: https://yt-project.org/

It's as easy as
1. pip install yt

2.
#!/bin/python3
import yt; yt.enable_parallelism()
ds = yt.load("PATH/TO/FILE")
yt.SlicePlot(ds, "z", "density", origin="native").save()

3.
mpirun -np 512 name_of_yt_script.py

Best wishes,
--------
Ryan


On Thu, Jul 11, 2024 at 2:50 PM Dammati, Sai Sandeep <saisandeepdammati at uconn.edu<mailto:saisandeepdammati at uconn.edu>> wrote:
Howdy!

I am a new user to FLASH. I am planning to run a 2D simulation with half a million meshblocks with a fixed size of 64x64x1 cells using Paramesh. I plan to use FLASH’s HDF5 format for visualization in VisIt. From a visualization standpoint, I want to know how many output files per frame do I need to write the HDF5 output so that I can comfortably visualize the simulation data in VisIt using the FLASH database plugin.

I have previously tried a 2D sod problem with 130760 meshblocks (of fixed size 64x64 cells) and tried to write a single output file, however, when I tried to visualize this single output file in VisIt 3.3.2 using the FLASH plugin with 512 cores, the file opens but when I do a simple pseudocolor of density, it just hangs and never renders the plot.

Can you please provide me some input on how to visualize large HDF5 datasets from FLASH in VisIt?

Thank you very much.


With Regards,
Sai Sandeep Dammati, Ph.D.,
Postdoctoral Research Associate,
School of Mechanical, Aerospace, and Manufacturing Engineering,
University of Connecticut,
Storrs, CT – 06269.
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