My physics has degraded from mathematical to intuitive, always a problem. Asking for help with what appears to be a simple problem that starts here:
fluid flowing in a tube at a given flow rate encounters a constriction reducing the area of the tube. This will create a pressure gradient related to Bernoulli's Principle;
I need clarification on the relationship between that pressure gradient under conditions of increased flow (volume/time)? Is this linear or exponential?