Rocket launch using axiom

[art3mis]

What I am trying to create.

Would appreciate any tips or suggestions from experts here. Here is an iconic rocket launch I am using for reference.
https://www.istockphoto.com/video/space-launch-system-takes-off-realistic-3d-animation-4k-gm959939024-262132480

From what I can see the simulation would be broken down into 2 parts.

1. The fast moving rocket exhaust
2. The ground effects steam and smoke

 

Also the ground smoke rapidly decelerates and billows up quite quickly. How would this be achieved?

I've tried simply keyframing a Force over time but not getting the expected result.
Also please don't refer to. Not really a tutorial and mostly impossible to follow!

 

(edited)

 

[RobiDoes3d]

I tried doing this effect for a personal project and here's what I learned:

It's very hard because Houdini's pyro is non-divergent, but a rocket thrust is very divergent. The only tool we have, to control the divergence, is a float @divergence field, which injects the divergence in all directions. It would be good if we had a directional divergence. I have attached a hip file with my attempt to direct the divergence. If you let the smoke be moved by divergence instead of vel it will rapidly decelerate, just like in real life.  

The only other way, I know of, to break the non-divergence is to source the vel with blend instead of add. Since that overwrites whatever velocity was there. 

A useful tip I found is to keep the sourcing as stable as possible. So, no noise. The turbulence in the smoke will come by itself anyway. If you add turbulence in the start, it will be way too turbulent 20m away from the rocket. 

If you come up with a solution, let me know. I have been testing this for months after work. 

This is what I settled with:

1: the hip file i sent you:

2. blending in the velocities:

This is the whats in the hip (you should probably retime it): 

volume.hip

[art3mis]

Thanks for the feedback!