工程流体力学分析,ansys
Surface force on an elemental volume:
for the two surfaces x Px dydz Px Surface stress
Px ( Px dx)dydz x
Pxdx
Px Px dx x dy
dz
Vector Sum
Px dxdydz x
for the two surfaces y, zNet Surface Force:
dxdydz y Px Py Pz Fs ( )dxdydz x y z
Py
Pz dxdydz z