3. Operands

3.1. Keyword TYPE_FLUI_STRU

♦ TYPE_FLUI_STRU = typeflui

[type_flui_stru] concept produced by the operator DEFI_FLUI_STRU [U4.25.01], providing the value of the added mass coefficient Cm.

Notes:

The value of Cm can be imposed using the COEF_MASS_AJOU keyword appearing in the DEFI_FLUI_STRU command. If fluidelastic coupling is taken into account, the added mass coefficient can be calculated by the operator as a function of the other characteristics of the beam.

The operator FONC_FLUI_STRU creates a concept of type [function] which is then directly usable by DEFI_MATERIAU [U4.43.01], keyword ELAS_FLUI .

The function is constant, parameterized by the curvilinear abscissa, and gives the value of Cm.

The combined use of operators FONC_FLUI_STRU then DEFI_MATERIAU option ELAS_FLUI is necessary when studying a « cross-flow pipe bundle » configuration, and it is only allowed for this type of configuration.