The system is liquid full, so only one phase.
I have looked at several examples on sites now including manufacturers and they all seem to agree with what I wrote above.
No, the Bulk Modulus is the ratio of change in pressure against change in volume, see formula below, where V = initial volume.
Bulk Modulus = -V dp/dv
If changing volume by 1%, dv = 0.01V
Therefore, dp = - Bulk Modulus x 0.01V/V
= 0.01 x Bulk Modulus
Thanks for the info. I agree, I think this is the only way I can do this. However, my understanding is that if bulk elasticity is approx 70,000 psi then it will take 700 psi to reduce volume by 1%, not 70,000 psi.
I have been asked to calculate the increase in pressure when adding a certain mass of LPG to an already liquid full LPG line. The pipework volume is fixed, there is no increase in temperature, only increase in LPG mass, so the pressure increase will be almost instantaneous due to the very low...
