implusive starting
 

Hello. everyone.

I've already done with my 2D euler code for steady case. Now, The 2D euler code for unsteady case is in test. For unsteady case,I selected impulsive start of airfoil. What does it means to solve impulsive start of airfoil physically?? And why is the impulsive starting for unstaedy problem dealt with so many??

Thanks in advance. With regards. Yoo