A gas at pressure P and temperature T flows at velocity v through a smooth tube with cross-section S. When gas passes through a wire mesh covering the tube and exerts negligible flow resistance, it heats up. The power acquired by the gas is equal to q. Determine the gas velocity behind the wire mesh. What is the force of gas pressure on the grid? Molar mass of gas µ, adiabatic index γ.
5.8 Probability of a thermodynamical state