MFLUID

Bernt Isaksen

I need some help with MFLUID. I define a load step with MFLUID, define a local coordinate system (4) with Z-axis pointing to the free fluid surface, define a set containing the wetted elements and run the analysis.

But I get the following error: 

SUBCASE 5 contains METHOD(FLUID) card, but the model
does not contain Fluid elements.

I have the following inn the input deck

MFLUID = 45
SUBCASE 5
LABEL Modes with liquid
ANALYSIS MODES

SPC = 1
METHOD(STRUCTURE) = 21
METHOD(FLUID) = 21

BEGIN BULK

MFLUID        45       4   190.0  7.5-10     481       0   

Any hints are appreciated.

Adriano_Koga

into your LoadStep, uncheck the 'METHOD(FLUID)'.

MFLUID uses a virtual fluid, so there's no actual fluid that needs METHOD(FLUID). Use just METHOD(STRUCT)