Questions about Pyro

[~nature~]

Hi,everyone

I'm a bit confused about pyro setup ,need your help,thanks very much in advance.

1.In the uprespyro solver, the setup separates the "Heat production" from the gascombustion and do it in another gas field vop.(see the image below).It seems that the calculation in gas field vop is almost the same as the gas calculate in gascombustion except that the "burn*heatout" is scaled by Timeinc before added to the temperature field. Correct me if I'm wrong.

I cannot understand why the setup do such separation in uprespyro but not do in pyro solver and what's the effect brought up by the Timeinc multiplication?

2.I guess there's some setup error in uprespyro object or I'm wrong again?

In the node "load_lowresburn"(SOP Scalar Field) the data name is lowresburn but the SOP Path is "../load_our_data/TEMPERATURE" which I believe should be "../load_our_data/BURN" and be consistent with the node "get_lowresburn".

~My Houdini version is 10.0.595

Edited July 5, 2010 by ~nature~

[bunker]

Hey ~nature~

the combustion model in the uprespyro has to be different since it's re-using

the lowres temperature and lowres fuel to create a hires burn field

the hires burn field is then added to a highres temperature field.

you can see that if you import the fields in SOP level pyro_viz.hip

"Timeinc" has to do with The current timestep, so if you have more substeps

you want to add less temperature on each step to get the same final temperature.

On your Dop Network, if you put more Sub Steps, you will get less Timestep.

for the "load_lowresburn" node, I believe it's a mistake, but the switch underneath

is set to 0 by default so it shouldn't go there anyway

hope that helps

Hi,everyone

I'm a bit confused about pyro setup ,need your help,thanks very much in advance.

1.In the uprespyro solver, the setup separates the "Heat production" from the gascombustion and do it in another gas field vop.(see the image below).It seems that the calculation in gas field vop is almost the same as the gas calculate in gascombustion except that the "burn*heatout" is scaled by Timeinc before added to the temperature field. Correct me if I'm wrong.

I cannot understand why the setup do such separation in uprespyro but not do in pyro solver and what's the effect brought up by the Timeinc multiplication?

2.I guess there's some setup error in uprespyro object or I'm wrong again?

In the node "load_lowresburn"(SOP Scalar Field) the data name is lowresburn but the SOP Path is "../load_our_data/TEMPERATURE" which I believe should be "../load_our_data/BURN" and be consistent with the node "get_lowresburn".

~My Houdini version is 10.0.595

[~nature~]

Hey ~nature~

the combustion model in the uprespyro has to be different since it's re-using

the lowres temperature and lowres fuel to create a hires burn field

the hires burn field is then added to a highres temperature field.

you can see that if you import the fields in SOP level pyro_viz.hip

"Timeinc" has to do with The current timestep, so if you have more substeps

you want to add less temperature on each step to get the same final temperature.

On your Dop Network, if you put more Sub Steps, you will get less Timestep.

for the "load_lowresburn" node, I believe it's a mistake, but the switch underneath

is set to 0 by default so it shouldn't go there anyway

hope that helps

wow,bunker,thanks for your invaluable information I'll dive into that.