A converging diverging nozzle is supplied by air from large reservoir where the temperature is 400K. The velocity at inlet section is 120m/s. A normal shock wave stands at the diverging part of the nozzle where the cross-sectional area is twice the area at inlet. The exit cross-sectional area of the nozzle is four times the inlet cross-sectional area. If the nozzle discharges to an ambient pressure of 100kPa, determine the pressure in the reservoir. Also find the stagnation pressure and stagnation temperature at the exit plane.

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.