problem of mass conservation for tracers in T3D, when new ZF from gaia is applied
In Telemac3d.f: before the line 2074, the precision asked for tracers is respected. After lines 2074 to 2102: new Zf of gaia (after erosion and deposition) is applied and new mesh is calculated with calcot.f. At each 3d point, VOLU changed but not the value of concentration. So conservation of mass is not respected at this stage: Concentration must be multiplied by the ratio (Old VOLU/New VOLU). Question: what is the minimum value to use in order not to divide by 0? @sara.pavan @chi-tuan.pham This issue is in relation too with the memo (19/04/2021) of @alexander.breugem