PoreXpert when opening experimental data files uses a material called the "Intrusion Fluid", the intrusion fluid is defined by the experimental data file you are opening and the properties of the intrusion fluid are then used for all of the algorithms that utilise the intrusion fluid. PoreXpert is set up to use Mercury as the default intrusion fluid.

 

If you are using water retention data or porometry data you need to make sure the intrusion fluid is correct for your sample. You can edit the intrusion fluid properties in the materials database browser.

 

The default parameters for the intrusion fluid (Mercury @ 20°C, atmospheric pressure) are:

 

 

The contact angles for mercury stated above are commonly used in experiments, however the contact angle differs depending on the materials being investigated, it may be necessary to change the contact angle, if investigating certain materials. A list of common contact angles is included below.

 

List of contact angles for mercury intrusion porosimetry