Modeling Closed Loop Heat Exchanger

Is it possible in floworks to model a closed loop recirculated plumbing system with a given volume of fluid. Say 15 gallons. Have this pass thru a heat exchanger and tell how long it will take to warm or cool the given volume of water?

I know how to do a single pass heat exchanger simulation. But how do you set it up to have it take a given volume into account in a closed loop configuration?

Jeff

SolidworksFlow Simulation