I have calculated the speed of sound for different fractions of water and steam at 10 Bar.a with IAPWS 1995 model which is supposed to be very accurate, software Prode Properties + Excel the calc's are done in Excel, in a cell I put the macro =StrMSS(1) which returns the speed of sound for vapor, liquid and vapor + liquid mixtures for water at 453 K 10 Bar.a Prode Properties calculates 1392 m/s for water (0.999 fraction) + steam (0.001 fraction) at 453.028 K 10 Bar.a Prode Properties calculates 9.73 m/s for water (0.001 fraction) + steam (0.999 fraction) at 453.028 K 10 Bar.a Prode Properties calculates 470.55 m/s for steam at 453.5 K 10 Bar.a Prode Properties calculates 501.58 m/s I am surprised to see those very low values (9.73 m/s) for low values of vapor mass fraction, I have some tabulated data which confirm the trend but still I am unable to understand the origin of phenomena, could you give some explanations?[/QUOTE]
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