Comet - air velocity

Tony Campbell

Hi folks, Using the post-processing command (plfi vel), in a air water interface problem, i see both the velocity vectors for air and that of water. i guess because the air is lighter, air speed is higher and the vectors have a huge compared to that of water (this is the required vel). i was wondering if there is a way of getting rid of the air velocity at the air-water interface. any help would be greatly appreciated.

probably there should be a way of using the concentration parameter, but i cant figure out how!

thanks for your continued help!