[Faraam]

Hi,

I am trying to implement the attached function for the density as a boundary condition in a multi-component-liquid case. In the equation is the mass flow of component A, t the time step and V the volume.

My approach:

1. Field function rhoZero:
${TimeStep}/(${Volume}) * ${Boundary species flux}
(${Boundary species flux} is a Surface Integral Report with the boundary as input part)

2. Field function rhoT:
${rhoNull} + ${Historyofrho_0Sample1}
(${Historyofrho_0Sample1} is a field history of rhoZero with the boundary as input part, a sliding sample window size of 2, Trigger: time step, time-step frequency > frequency: 1; Start: 0; Enable stop: disabled; Stop: 0)

3. In order to implement the field functions 1 and 2 as a boundary condition (because only the specification of a mass fraction of the respective component at the interface is possible):

3.1 Field function wDispersed:
${rhoT} / ${Density}

3.2 Field function wConti:
${wDispers} / ${H*}
(where ${H*} is a constant)


When select field functino 3.1 and 3.2 as Species Mass Fraction and try to run the simulation I get the warning "Unable to find field function wConti on "NameOfBoundary". Please check that function is defined here."

Does anyone know where I'm making mistakes? Hope everything is understandable.