Is turbulence possible in inviscid flows?

If the turbulence ever exist in the inviscid flow, you are making it as self-sustaining, which is not possible in reality. Turbulence is not a self-sustaining flow. Take a cup of coffee, you stir it for a while and then leave it to itself.You will find the turbulence in the coffee decays with time. read more

Reynolds number for a flow, for both internal flow(flow inside object like pipe or conduit) and external flow(flow around an object as in cars, aircrafts) is inversely propotional to Dynamic Viscosity of the fluid in consideration. read more