Review Results for Risk Based Analysis


With the consequence and risk applied to each simulation, a risk contour can be added.


Toggle on the visibility of the contour with a Frequency data type. From the properties panel, change the Data Type to Risk as shown in the figure below.


Picture 42

Tutorial 11 - Figure 31 - Changing the risk contour to have a Risk data type


This will only slightly change the contour visually, however the legend will now have changed to show the ranges corresponding to the calculated risk, indicated by the light blue arrow in the figure below. This is because the maximum and minimum values of the frequency contour were automatically chosen. When switching to the risk data type the values where automatically updated for the risk data.


You can change to a user-defined maximum and minimum values from the properties panel of the contour in the Color Map section. change the height of the contour up and down within the risk data set. 


Tutorial 11 - Figure 32 - Risk contour showing exceedance of 10%LFL


As of version 2.11 of in:Flux, in addition to risk contours showing exceedance values, a 3D isosurface of a chosen risk value may be defined. These risk isosurfaces will have the same options as the risk contours but will require a single value to be chosen to display.


To add a Risk Isosurface, choose it from the Select Item dropdown menu:

  1. Enter a Name for the isosurface or use the automatically defined one.

  2. Select the Risk Data Set defined earlier as the Risk Data 

  3. Choose a Data Type to display. For the below figure, Risk was chosen.

  4. Enter an Exceedance value of 10 %LFL, the units will be based on the variable associated with the chosen risk data set.

  5. Enter a Value to be displayed for the isosurface. As only one value for a variable can be displayed on a single isosurface it needs to be entered. For this risk-isosurface in the figure below a value of 2E-03 was entered.

  6. Choose a Color for the isosurface and click the Add Item button


Tutorial 11 - Figure 33 - Risk Isosurface showing 3D view or region having exceedance of 10% LFL and 2E-03 risk


Continue to the next section to look at exceedance curves for gas cloud volumes.