Incompressible CFD Solver

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The in­com­press­ible flow solver is based on state of the art Fi­nite El­e­ment tech­nol­o­gy ap­plied to flu­id me­chan­ics. It is ful­ly cou­pled with the sol­id me­chan­ics solver. This cou­pling per­mits ro­bust FSI analy­sis via ei­ther an ex­plic­it tech­nique when the FSI is weak, or us­ing an im­plic­it cou­pling when the FSI cou­pling is strong. In ad­di­tion to be­ing able to han­dle free sur­face flows, there is al­so a bi-pha­sic flow ca­pa­bil­i­ty that in­volves mod­el­ing us­ing a con­ser­v­a­tive lev­el-set in­ter­face track­ing tech­nique. Ba­sic tur­bu­lence mod­els are al­so sup­port­ed. This solver is the first in LS-DY­NA to make use of a new vol­ume mesh­er that takes nice sur­face mesh­es bound­ing the flu­id do­main as in­put. In ad­di­tion, dur­ing the time ad­vance­ment of the in­com­press­ible flow, the so­lu­tion is adap­tive­ly re-meshed as an au­to­mat­ic fea­ture of the solver. An­oth­er im­por­tant fea­ture of the mesh­er is the abil­i­ty to cre­ate bound­ary lay­er mesh­es. These anisotrop­ic mesh­es be­come a cru­cial part of the mod­el when shear stress­es are to be cal­cu­lat­ed near flu­id walls.