(a) H = Pressure/ density (m2/s2)
V = speed of flow (m/s)
z = height from the datum (m)
Q = the heat added per unit time to the stream tube by conduction divided by the mass flow rate through the tube, (m2/s2)
W = the viscous working rate on the environment of the tube divided by the ...
The energy equations for compressible gas are examined for fluid mechanics.