How do scientists study liquid tungsten?
One way is to use electristatic or electromagnetic forces to hold the liquud in place.  This abstract refers to a "non-contact method" and an "electrostatic levitate", which us enough to reveal the basic strategy.  Unfortunately the article is behind a paywall, so you have to put up to get details on the good stuff.

Industrially, metals like tungsten are not processed as liquids.  They are ... see here.