Basic Settings -> Fluid 1 - H2 Ideal Gas
Fluid 2 - N2 Ideal Gas
оба газа Continious Fluid
Buoynat, X=0, Y=-g, Z=0
Buy.Ref.Density = 1 [kg m^-3]

Fluid models -> Multiphase -> негомогенн модель
-> Heat Transfer -> гомогенн модель -> Izotermal 20C
-> Turbulence -> гомогенн модель -> k-Epsilon
-> Buoyancy Turbulence -> none

Fluid Specific Model -> Fluid Buoyancy Model -> Density Difference

Fluid Pair Models -> Interface Transfer -> Mixture Model
-> Interface Len.Scale -> 1[mm]
-> Drag Force -> Drag Coefficient -> 0.44
-> Mass Transfer -> none

Initialization -> давление атмосферное;
скорости газов по координатам 0
объемные доли газов H2 -0,8; N2 -0,2

Details of error:-
----------------
Error detected by routine PEEKR
CDANAM = SOLUTION/ZN1 /BALANCES/MASSIN_FL2
CRESLT = NONE

Current Directory : /FLOW/ASSEMBLE/TIME-0

| ERROR #001100279 has occurred in subroutine ErrAction.
| Message:
| Stopped in routine MEMERR