# Undersaturated Water Isothermal Compressibility Coefficient (C_{w,us})

The compressibility (also known as the coefficient of compressibility or isothermal compressibility is a measure of the relative volume change of a fluid or solid as a response to the application of pressure.

The compressibility of water is a function of pressure and temperature and it is a key factor in transient flows.

The Properties of Petroleum Fluids, McCain

### Correlations

- 1-McCain
- 2-Dodson and Standing
- 3-Meehan

### Input Parameters

Name | Input Value - Unit | Converted Value | Validity | Link to Calculation Page | |||
---|---|---|---|---|---|---|---|

Temperature | 165 | °f | |||||

Pressure | 3500 | psi | |||||

Salinity (NaCl equivalent) Water salinity in parts per million of mass (ppm _{m}) | 68000 | ppm | |||||

CALCULATE | |||||||

## Results | |||||||

Correlation | Calculated Value | Warnings | Remarks | ||||

1-McCain | 0.000002659 | 1/psi | Should not be used outside of these ranges: For temperature range from 209.3 to 270 F For pressures above 1000 psi | ||||

2-Dodson and Standing | 0.000002621 | 1/psi | For temperatures less than 209.3 F | ||||

3-Meehan | 0.000002538 | 1/psi |