CFD Online Discussion Forums - Dynamic mesh refinement failing in interFoam

I'm running a simple bubble growth case, which is running perfectly fine without the dynamic mesh refinement. I'm using a grid size of 0.02*0.02mm generated by blockMesh for the simulation.

I've adaptive time stepping turned on with a maxCo set at 0.5, while running with the dynamicMeshDict, I'm noticing that the deltaT starts dropping drastically after a point (upto 1e-53 or 1e-119) and the program crashes with floating point exception error. Also even while the program is running normally, the deltaT is much higher than a much finer grid (around 2 e-7).

I've run with a fine grid of 0.01*0.01mm generated by blockMesh without dynamic mesh and it's running perfectly fine, and the average deltaT is also higher (around 2e-6).

I'm sharing my dynamicMeshDict here. I'd really appreciate if someone could share their inputs. I see that a lot of them are facing the same issue with dynamic mesh refinement but there has been no resolution posted.

Code:

/*--------------------------------*- C++ -*----------------------------------*\

  =========                 |

  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox

   \\    /   O peration     | Website:  https://openfoam.org

    \\  /    A nd           | Version:  9

     \\/     M anipulation  |

\*---------------------------------------------------------------------------*/

FoamFile

{

    format      ascii;

    class       dictionary;

    location    "constant";

    object      dynamicMeshDict;

}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //



dynamicFvMesh   dynamicRefineFvMesh;



// How often to refine

refineInterval  5;



// Field to be refinement on

field           alpha.water;



// Refine field in between lower..upper

lowerRefineLevel 0.001;

upperRefineLevel 0.999;



// If value < unrefineLevel unrefine

unrefineLevel   0.001;



// Have slower than 2:1 refinement

nBufferLayers   3;



// Refine cells only up to maxRefinement levels

maxRefinement   1;



// Stop refinement if maxCells reached

maxCells        250000;



// Flux field and corresponding velocity field. Fluxes on changed

// faces get recalculated by interpolating the velocity. Use 'none'

// on surfaceScalarFields that do not need to be reinterpolated.

correctFluxes

(

    (phi none)

    (nHatf none)

    (rhoPhi none)

    (alphaPhi0.water none)

    (ghf none)

);



// Write the refinement level as a volScalarField

dumpLevel       true;





// ************************************************************************* //