Fig. 1
The first change I did was increase the scale of the whole scene (specifically 10x)
to match the real life size of large smoke stacks
Without changing anything in the solver, I just scaled up the source of the smoke and ran the sim
A few problems arose
Looks too detailed, less clumps more noise
Pretty slow to rise
Simulation took a long time
So to test, I increased the voxel size from 0.1 to 0.5
Based on previous sim I changed
Up the buoyancy from 0.15 to 1.5
Increase block size from 0.2 to 1
Increase wind speed
Increase dissipation from 0.01 to 0.05
Increase turbulence from 0.5 to 0.75
Increase swirl size form 0.5 to 1.5
I ended up with this test:
Fig. 2
Simulation took short time for 100 frames
The simulation did not turn out the way I was hoping for
With some small adjustments and decreasing the voxel size back to 0.1 I ran a sim
Fig. 3
100 frames took around 2 hours to simulate
Problems I see in the sim
It rises way too fast, buoyancy needs to be lowered
Wind speed needs to be increased, need to move screen left slightly
Lower block size to around 0.5, the chunks look too big
I want an in-between of what I had in Fig. 1 and Fig. 3
Overestimated parameters
Next Steps:
Change main smoke
Lower buoyancy
Increase wind speed
Disturbance and block size smaller
Use main smoke as a base and adjust for background smoke
Render
