Question
How many increments should be specified for components in a Flownex model? What is the purpose of component incrementation, and how can a user determine the appropriate number of increments required for accurate results?
Answer
The number of increments specified for a component determines how finely the component is discretized within the simulation. Increasing the number of increments creates a finer computational grid, which generally improves the accuracy of the calculated results by capturing variations in fluid properties and flow conditions more effectively along the component.
A recommended approach for selecting the appropriate number of increments is to perform a grid independence study. This involves running the simulation with an initial number of increments and then gradually increasing the number of increments while comparing the resulting outputs. The process should be repeated until further increases in the number of increments produce only insignificant changes in the results. At this point, the solution is considered grid independent, indicating that the selected discretization is sufficiently refined. The use of additional increments is particularly important in applications where large density variations occur within a component, as these changes can have a significant impact on the accuracy of the simulation.