[harry123]

In the SandiaD tutorial for reactingFoam solver, in controldict file, the deltaT is specified as 1. Is that the actual value for time step size ? My question is since different reactions are considered using a GRI mechanism, and these reactions will have different reaction times, mostly much lower than 1 second, how is the deltaT value of 1 feasible ?

[francescomarra]

Dear Harry123,

this tutorial (SandiaD_LTS, in OF ver10), adopts a solver to compute the solution at steady state.
In this case, deltaT stems for iteration, so the real control is the end time, which means number of iterations.
Note also the time scheme adopted, which is localEuler in the fvSchemes file. This corresponds to the meaning of the LTS acronym in the tutorial's name, which means Local Time Step, a procedure to accelerate convergence to steady state.

Best regards,

Francesco