That is, increases in the fluid velocity require that the area decrease in the direction of the flow. For supersonic flow (Ma > 1), Ma - 1 > 0 and the area must increase in the direction of the flow to cause an increase in the velocity. Changes in the fluid velocity dV can only be finite in sonic flows (Ma = 1) when dA = 0. The effect of the .... "/> Sonic velocity of fluid ceramic apprenticeship philadelphia
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