hi,i’m using phoenix fd fire as liquid source.when the simulation begins, a message is shown like the picture below, and it makes the simulation very slow, how to solve the problem?
By default all sources will affect your simulators and in this case you have a FireSource and a Liquid Simulator. Just set the Fire source in the Exclude list from the Scene Interaction rollout of the Liquid simulator.
You should create a liquid source and use that one instead of the fire source 
i want to simulate bubbles rise from the water,how to do that?
You can take a look at our bubbles scene here - Chaos Docs