The ICFD solver may run as a stand alone solver or be ful­ly cou­pled with the the sol­id me­chan­ics and ther­mal solvers of LS-DY­NA to solve com­plex mul­ti-physic prob­lems such as flaps os­cil­lat­ing in the wind, drag around ve­hi­cles or any type of bluff body, with pitch­ing move­ment or sta­t­ic, be­hav­ior of a heart valve, wave im­pacts, slam­ming cas­es and so forth.

De­scrip­tion: A clas­sic ap­pli­ca­tion of the ICFD solver is the study of tur­bu­lent flows and drag forces around bluff bod­ies such as cars or oth­er types of ve­hi­cles

De­scrip­tion: The “Turek” prob­lem is a chal­leng­ing Flu­id Struc­ture In­ter­ac­tion (FSI) Bench­mark ap­pli­ca­tion. The Von Kar­man vor­tex street that de­vel­ops be­hind the cylin­der in­ter­acts with the flex­i­ble flag. At steady state, pe­ri­od­ic os­cil­la­tions are ob­served .Large de­for­ma­tions of the flag in the chan­nel oc­cur which re­sults in fre­quent au­to­mat­ic re-mesh­ing of the flu­id do­main. It is al­so a case where the sol­id den­si­ty and the flu­id den­si­ty may be equal which usu­al­ly gen­er­ates heavy in­sta­bil­i­ties in FSI cas­es. It is there­fore a good prob­lem for val­i­dat­ing the strong FSI cou­pling avail­able in LS-DY­NA.

De­scrip­tion: This he­mo­dy­nam­ics ex­am­ple high­lights the state of the art strong FSI ca­pa­bil­i­ties of the ICFD solver. Due to the pres­sure dif­fer­ence, the heart valve leaflets open to al­low the blood flow. Then, a strong counter-pres­sure forces them shut again and the blood flow de­creas­es. Cour­tesy of Mo­ham­mad Hos­sein of McGill Uni­ver­si­ty, Que­bec.

De­scrip­tion: This ex­am­ple fea­tures a 3D mold fill­ing case with the flu­id pro­gres­sivil­ly fill­ing the sol­id shape. This prob­lem may be treat­ed as a con­ju­gate heat trans­fer prob­lem us­ing strong cou­pling with the LS-DY­NA ther­mal solver.

De­scrip­tion: This Flu­id-Struc­ture In­ter­ac­tion ex­am­ple fea­tures the flow around a hor­i­zon­tal wind tur­bine (HAWT) us­ing a non in­er­tial ref­er­ence frame.

De­scrip­tion: This 3D val­i­da­tion prob­lem com­bines slosh­ing and flu­id-struc­ture in­ter­ac­tion. It is based on the ex­per­i­men­tal set up by E.Bo­tia-Ve­ra, A. Souto-Igle­sias, A. Bu­lian and L. Lobovsky, Three sph nov­el bench­mark test cas­es for free sur­face flows, 5th ER­COF­TAC SPHER­IC work­shop on SPH ap­pli­ca­tions. In or­der to solve this case, strong FSI cou­pling is manda­to­ry.

De­scrip­tion:  Free sur­face flow im­pact­ing on a ver­ti­cal cylin­der. The prob­lem reach­es steady state where the wave pat­tern be­hind the cylin­der re­mains un­changed.

De­scrip­tion: This case rep­re­sents a stamp­ing ap­pli­ca­tion in­volv­ing FSI and ther­mal cou­pling. A hot plate is pressed against a dye. A ser­pen­tine tube is em­bed­ded in the die and a coolant pass­es through that pipe which pro­gres­sive­ly cools the die and the plate.

De­scrip­tion: A bot­tle with a high­ly vis­cous ma­te­r­i­al is squeezed from the sides. The cylin­ders rep­re­sent two fin­gers. The study is aimed at an­a­lyz­ing how much flow re-en­ters the bot­tle af­ter the fin­ger forces are re­leased. Cour­tesy of Proc­ter & Gabm­le.

De­scrip­tion: The fol­low­ing ex­am­ple shows a ful­ly cou­pled Flu­id Struc­ture In­ter­ac­tion prob­lem with a free-falling space cap­sule im­pact­ing the wa­ter. The flu­id is mod­eled as a free sur­face flow.