Attachments:
meigaoding.hip (430.3 KB)

Hy,

U need to make the moving object a Static object so it interacts. and use the option “use deforming geometry” in the static object node in DOP. And keep the merge relation to “Collide - Mutual” Moreover the file u posted has just a smoke container - no source to emit smoke. Create a “Source from object” anything like a sphere inside ur container.

i have done the same and posting the file for your reference

Correct me houdini ppl if im wrong here! im also learning houdini.

Attachments:
smoke_interaction.hipnc (498.3 KB)

Attachments:
smoke_interaction.hipnc (873.0 KB)

dyzh_3d
but

Hey this time u kept the buoyancy force to zero. but the smoke volume need some information of the motion velocity to interact. Go to Fields>>Collisions of the Smoke solver and tick “Use point velocities for collision”. This way smoke will try to react with the nearest point that comes in contact.

Cheers

Attachments:
smoke_interaction_02.hipnc (871.1 KB)