Dynamically Terminating a Flow

Normally, the flow into or out of a tank stops once you reach the desired quantity or level. However, in some situations you may wish to terminate a transfer if some event or condition occurs that you cannot predetermine (e.g., a decision to divert flow to a preferred outlet tank that just became available). In this case, you can turn off the flow into or out of a tank by specifying a variable transfer rate instead of a fixed transfer rate (see previous discussion, Varying the Transfer Rate). A variable transfer uses the Tank_Rate subroutine to determine the rate for each time step—to terminate a transfer, return a rate value of 0.