In the context of free-burning scenarios, how should grid analysis be conducted?

[boyu-dotcom]

To set up a free-burning scenario and perform grid analysis, is it necessary to first establish a simplified model to determine the heat release rate and then use the formula to calculate the optimal grid size?

[Er9y714]

For performing a grid analysis, I would initially set some criteria to evaluate. Since HRR might influence the assessed outcome, HRR should not be a parameter in free-burning scenario (as long as the HRR is a prescribed input, i.e. natural fire spread is not assessed).

[boyu-dotcom]

How can I perform grid analysis in a free-burning scenario? Could you please explain this in detail?

[Er9y714]

If you mean grid sensitivity analysis, you should define the parameters of interest, vary the grid size, and compare the relevant outputs to demonstrate convergence. Identify the grid size at which the solution stabilizes, and adopt it for your final simulation.