profile: tangential velocity distribution

https://molflow.web.cern.ch/content/interpretation-angular-distribution

"Finally, let me recommend a new feature in Molflow: you can create a custom resolution angle map for any facet (introduced in Molflow 2.6.52, the goal of this feature is to allow desorbing from a sampler facet according to the sampled distribution). The screenshot below (from Advanced facet parameters) would create a profile with 1000 elements, if required:"

Is there a similar feature for the tangential velocity distribution? I am only interested in the speed distribution along a specific direction, but it seems to me that the tangential velocity distribution sums over Phi.

Thanks,

Chao

You can achieve it in two ways:

1) Put a facet so that its normal points to the direction of your interest, and set orthogonal velocity profile on it.

2) Use the 2-dimensional angle map and for each theta/phi pair calculate their contribution to your desired direction. It's harder, I'd go with the first option.