05-31-2015, 12:54 PM
Hi,
I am doing a tornado simulation where I have particles rotating around Y axes and emit smoke only. I am simulating only smoke, i.e no fuel. I set smoke bouncy and temperature bouncy to zero, my grid size is 10x192x100. Pls see attached for more simulation settings. Finally note that there is volume axis force that just rotates the smoke around Y axes and and pushes smoke away from Y axes as well.
My question: If I set blocking sides to "none", then the simulation starts as expected, i.e. smoke building up rotating around Y axes for bit , however suddenly the smoke starts to move toward the center of the scene as if there was a pulling force at the center of the simulation that sucks smokes toward it?! However, if I set blocking to "both" this pulling toward the center behaviour does not occur.
I am not sure why this happens and why "blocking" creates this behavior?
Thanks,
I am doing a tornado simulation where I have particles rotating around Y axes and emit smoke only. I am simulating only smoke, i.e no fuel. I set smoke bouncy and temperature bouncy to zero, my grid size is 10x192x100. Pls see attached for more simulation settings. Finally note that there is volume axis force that just rotates the smoke around Y axes and and pushes smoke away from Y axes as well.
My question: If I set blocking sides to "none", then the simulation starts as expected, i.e. smoke building up rotating around Y axes for bit , however suddenly the smoke starts to move toward the center of the scene as if there was a pulling force at the center of the simulation that sucks smokes toward it?! However, if I set blocking to "both" this pulling toward the center behaviour does not occur.
I am not sure why this happens and why "blocking" creates this behavior?
Thanks,