April 19, 2021 at 9:46 pm

Konstantine Kourbatski

Ansys Employee

yes, this explanation is about right. An expectation for the total pressure to be conserved along a streamline (i. e. Bernoulli's equation to the satisfied) holds only in the inviscid approximation. As a result, Cp at the stagnation point can be greater than 1 when the stagnation pressure is scaled by the freestream dynamic pressure. For more rigorous mathematics of this, you may refer to a fluid dynamics textbook. E. g. Batchelor in his An Introduction to Fluid Dynamics discusses it in Chapter 5 Flow at Large Reynolds Number:Effect of Viscosity.nAnother consideration is compressibility, as the representation of total pressure as a sum of static and dynamics pressures become approximate when compressibility effects kick in.nn