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Showing results for tags 'gas'.
Found 25 results
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Hi, I love the "wind tunnel direction" feature in the sparse solver, and I would like to find a way to mask it's effect. I know this is just a vector field node with "External Direction" set to a given value, but I don't know how to apply a mask to it (say I'm simulating a chimney with smoke rising...
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Hello, I am trying to work with OpenCL but as soon I enable them on few nodes, like the gas disturb, gas turbulence, it stops working. I just get a mushroom smoke effect. Does openCL not work on these fields? I have attached some screenshots. The first image is wit...
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Hey all I have some low-ish resolution VDB dust clouds created in C4D with the TurbulenceFD plugin. These contain velocity channels. So far, I'm just not satisfied with the overall detail. What I've done to try and increase detail is convert the VDBs to Volumes, Volume Resample them, then...
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Hello, I am really confused with Gas Disturb node. I tried reading the documentation and tried different values but I haven't seen much difference when I change the Threshold Range value. Can some please help me and explain what exactly the Threshold Range is doing? Thanks.
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Hi I'm new to Houdini and recently I've been getting into DOPs. I have a question I've been trying different things out in dops to see how they work, been playing around with the "Gas Match Field" node and found that it works quite nicely when both fields you are supplying the node wi...
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Greetings, I have few microsolvers in my Flip Solver>Volume Velocity and I want to apply them to only 1 of my 2 emitters. Do I use a POP Wrangle after my MicroSolvers like (if viscosity > 500 then apply) or do i need to make some initial groups of my particles and apply the micro solvers to the...
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Hi, I'm trying to use a pyro sim to make some realistic clouds and to get the effect I want I need varying levels of dissipation, turbulence, and disturbance at different heights. I've set up some scalar fields and made a gas wrangle to have the gradients I want set up but I can't manage to get them... -
Hey! I'm trying to get a very low freq turbulence in my smoke trail sim, but even if I put pulse length to a very high number, 10000, the turbulence keeps moving with time, while I want some sort of static turbulence to break my trail line..any idea? cheers
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Hi everyone, I am trying to set the values to a collision field in a gas wrangle. I am using the gas build collision mask node to create the necessary fields and then I am trying to set values with a gas wrangle. Is it even possible to do it this way? I have a example scene that show...
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Hi Guys, I am struggling to achieve a believable blood in water effect. I was hoping someone could give me some tips or advise to help steer me in the right direction. Currently I am using a pretty simple pyro setup and sourcing a custom vel field, in an attempt to simulate underwater turb...
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smoke Basic smoke moves through collision geometry
cybor09 posted a topic in General Houdini Questions
Hi people! I'm learning some things in Houdini to create HDA's for cinema 4d or export vdb's simulations to render in c4d. In this case, I want to make a smoke simulation but I have one basic issue that I'm sure it solves with a simple way. I have one torus emitter inside of a tube bu...
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Hi again, I have an explosion being sourced by particles. I have a gas dissipate micro solver to make the fuel dissipate faster because too much fuel is lingering after the explosion. However, I also have another source of fuel which is for the fire that keeps burning after the explosion has en...
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Hi, In my pyro sim, I just want to add some velocity in the container before my smoke begins emitting. I could do this by creating a box and using fluid source and adding curl noise. I did not really like the results, so I decided to try something else. I tried adding a gas turbulence and turne...
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Hi Guys, I am currently working on a shot where I need to simulate an object falling slowly through deep water whilst bleeding (The more blood the better). Initially I began with a pretty simple setup, An emissive object, a collision object and a divergence volume which is being used for...
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Please, I just need a couple of pointers I've been trying to set-up a pyro simulation, have some smoke rise up and collide with an rbdobject. I've uploaded my hip file and written all my questions and problem explanations in there. Plus I think that it's much easier to understand if you...
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Hello everyone, I've been getting into DOPs recently and i just cant figure out something. I have a SmokeObject and an RBD object. They are both plugged into the Pyro solver. The smoke has a collision relationship with the RBD object, and the Pyro solver's option "Temperature Merge" is s...
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Hi guys ! I'm trying to make a afterburner, jet gas exhaust effects, but I'm struggling right now. I looked at the Pyro Jet Exhaust HDA from SideFX (https://www.orbolt.com/asset/SideFX::pyrojetexhaust). I opened it and look how it works but I still can't understand. There is no combustion,...
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Hi Guys, I have recently started experimenting with Houdini and have stumbled upon a problem I can't seem to find a solution to. I have a Pyro fx explosion setup and I would simply like the gas resize field to reach the maximum bounds of the container and then switch off. Currently,... -
Hi Guys, I'd like to know a way to control different forces, based on some attributes. I find is very easy to control Pop Forces based on position or velocity or Cd attributes... but I want to have this control using for example Gas Turbulence or Gas Surface Tension to control my fluid... Imagi...
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Hi, first of all sorry if this has already been asked. I'm advecting some particles from a pyro sim. I would like to transfer some attributes from the pyro sim to the pop sim, like density, color, other... I have to use the gasfieldtoparticle node if I'm correct, but I cannot set it up c...
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just for curiosity stuff the navier stoke is coded inside Gas project Non Divergent nodes? -
I have been at this project for a while now and am so sick of this not working. I just can't seem to make the tornado spin around the right way and be more directed by the particle movement. Can someone tweak this and give it back or merely give some suggestions based on the file? That would be awes...
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Hey Everyone on this beautiful sunday! So, as I am touching pyro for the first time, of course I am using the "Gas Resize Fluid Dynamic" node (from here on out called the "resize node") in my DOP-net to auto adjust the grid size. However, I a getting this slight flicker in the simulation, as...
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I've added the gas upres node in a duplicate of my dopnet (smoke simulation only no combustion). I have exported the vel, density fields for the original sim. Then I animate the absolute frame in the upres node (starts at 1- 50F and then slows down). However the retimed sim looks similar but more sm...
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I was experimenting with having a gas sim on a moving object. The emitter translated with the object and left a trail of mist. Since the emitter was moving, the voxels at the emitter always looked very crude and low rez, no matter how many substeps, and no matter the resolution. By the time the smok...
