Analysis operations
Contents
The analysis operations are not available in all versions of PoreXpert, each individual tutorial identifies which version of the software the operation is available with. The analysis operations can be used with any previous tutorial files or use the dedicated analysis tutorial files detailed below.
A list of the tutorial files used and created by this section of the tutorial are listed below:
Optional experimental data file
| • | Fertiliser.csv |
| • | Granite.csv |
Data files required
| • | Granite analysis.pxt |
Data files created
| • | Granite results.pxt |
Reporting Files created
| • | Granite analysis.pdf |
| • | CSV reports that accompany operation list |
Different size unit cell data file
| • | Fertiliser different fits.pxt |
| • | Reports that accompany file |
There is currently no batch file that performs the analysis operations it will be added in a later version of the PoreXpert tutorial.
Summary of analysis operations
| 1. | Analyse the pores and display a graph showing how many pores have ink-bottle pores (pores with only one throat connected). Compare the results between different structure types for the fertiliser sample by exporting the data as a spreadsheet. |
| 2. | Determine the content distribution in the z-direction |
| a. | For a wetting fluid (Water intruding into the top of the unit cell for 500 ms, with 10 intermediate structures) |
| i. | Compare the fluid uptake for a wetting simulation over the same time period with a small applied pressure i.e 0.001 MPa. (Repeat the above operation with the applied pressure.) |
| b. | For a non-wetting fluid (Not used in the tutorial system but works in exactly the same way and can use the same instructions) |
| 3. | Output of Pore and Throat Size distribution |
| a. | by number of features |
| b. | by volume of features |
| c. | Combined pore and throat size distribution |
| 4. | Microtoming - generate a histogram for granite sample and export the histogram data as a spreadsheet file. |
| 5. | Fluid Uptake Progress |
| a. | Conversion of wetting simulation data to graphical analysis of wetting versus time to check wetting versus square root of time. |
| i. | Compare the fluid uptake for a wetting simulation over the same time period with a small applied pressure i.e 0.001 MPa. |
| b. | Non-wetting fluid uptake graph created of pressure versus intrusion. |
Guidelines for fitting the experimental data file(s).
Granite
To fit the granite data file as used in the tutorial , use the default fitting parameters with a large centre zone with a minimum unit cell size of 10 x 10 x 10. The tutorial uses a 10 x 10 x 10 unit cell size. Perform the initialisation steps as previously explained in the initialisation tutorial. You then need to perform the simulations that are described in the above list.
Feriliser
The fertiliser data file is a more complicated data file than the data files previously used in the tutorial, it is recommended when fitting the data file that the number of iterations is increased from 20 to 50 iterations per temperature. The number of iterations can be changed in the advanced options on the simplex page. If you open the fertiliser different fits.pxt data file it is possible to view the effect of increasing the number of iterations at each temperature on structure type and the effect of changing the size of unit cell
The additional data file Fertiliser different fits.pxt, contains three simplex fits of the experimental data, the first fit shows the unit cell using the default fitting parameters, the second structure shows the unit cell after increasing the number of iterations and the third fit shows a large cubic unit cell 25 x 25 x 25 which shows some of the capabilities of PoreXpert Cloud. We recommend that if you need a structure this large that you use the Porexpert Professional Cloud service as it has been designed to handle structures of this size.