Modelling lling industrial ustrial multip tiphase hase flows s with h STAR-CCM+ CM+ Simon mon Lo & Domin minik ik Kubicki icki
Cont nten ents ts Valida dati tion on of the e Eu Euleri rian an mul ultipha tiphase se (EM EMP) mode del in chemica emical and proce cess s applicat ations ions – Slurry pipe flows – Stirred vessels • Solid-liquid • Gas-liquid Inter erphase phase transf sfer r of chemica emical l species cies in STAR AR-CC CCM+ M+ v7.02 .02 Granular ar flow w mode del in STAR AR-CC CCM+ M+ v7.04 .04
Horizon rizonta tal l slurr rry pipe e flow experi eriments ments Phas ase e 1 – water er Pip ipe dia iamet meter er (D) D) = 5 51.5 5 – 495mm 5mm Dens nsit ity y = 9 997. 7.6 6 kg/m 3 Pip ipe le length th (L) L) = 1 10m Vis isco cosity sity = 8 8.887e 87e-4 Pas Slu lurr rry y veloc locit ity y (V) ) = 3 3.0 – 5.4 m/s Ph Phase ase 2 – silic ilica part articles icles Ex Exper periment imental al data a from om Ek Ekamba ambara a et al. l. Dens nsit ity y = 2 2650 50 kg/m 3 (200 009) 9) Ind. Eng. Chem em. Res. s. 48, pp. 480 m Dia iamet meter er (d) d) = 9 90 - 480 m 8159 59-81 8171. 71. Volu lume me fraction ction (vf) f) = 0.0918 918 - 0.273 73 1m 1m Measur asurem ement ent pla lane ne Unif iform soli lids s conce centra tratio ion V g D L=10m 10m
Sett ettlin ing g of parti ticles les along ng the pipe Liq iquid id veloci locity Outle let Mid iddle dle Inle let Part rticle icle volume lume frac action ion
Compari parison on with th measured asured data 1m 1m Measur asurem ement ent pla lane ne Unif iform soli lids s volu lume fracti ction (vf) and nd slurr urry y velo locity city (V) V g D L=10m 10m 5 m , d=16 165 , vf =0. 0.189 189 D=51. 51.5mm, V=4. 4.17 17 m/s 90 m , d=90 , vf =0.19 D=103m 103mm, V=3 m/s STAR-CCM+ STAR-CCM+
Compari parison on with th measured asured data 0 m , 0 m , d=27 270 , vf =0. 0.2 d=48 480 , vf =0. 0.203 203 D=51. 51.5mm, V=5. 5.4 4 m/s D=51. 51.5mm, V=3. 3.41 41 m/s 5 m , vf =0. d=16 165 0.273 273, D=495m 495mm, V=3. 3.46 6 m/s 5 m , vf =0. d=16 165 0.091 0918 8 D=51. 51.5mm, V=3. 3.78 78 m/s STAR-CCM+ STAR-CCM+
Solid lid-li liquid uid stirr irred d vessel sel Soli lid-liqu iquid id syst stem em 1ft tank k D=H, fla lat base se sin ingle gle 6bla lade de PBT d=0.5T 5T C/H=0.2 0.25, 5, 4 baffles es H Liq iquid: id: g Water er-sa -salt t solu lutio tion r l =1150 0 kg/m 3 =4.5e-3 -3 Pas C d h Soli lid: d: r Gla lass s partic ticles es d p =3.0 3.075 75 mm D r p =2485 485 kg/m 3 Measur asurem ement ent lin line for veloci locities ies at h/H=0 =0.2
Compari parison on of verti tical cal solid id concentratio ntration 1 0.9 Experimental 0.8 Star-CCM+ STAR-CCM+ 0.7 0.6 h/H 0.5 0.4 0.3 0.2 0.1 0 0 1 2 3 4 5 C/<C>
Comparis parison on of liqui uid d velociti cities es Liquid Velocities 0.5 Uz 0.4 Experimental 0.3 Uz Star-CCM+ STAR-CCM+ 0.2 Ur Experimental 0.1 U/Utip Ur Star-CCM+ STAR-CCM+ 0 Utheta -0.1 Experimental -0.2 STAR-CCM+ -0.3 -0.4 -0.5 0 0.5 1 r/R
Compari parison on of solids ids velociti cities es Solids Velocities 0.5 0.4 Uz Experimental 0.3 STAR-CCM+ Uz Star-CCM+ 0.2 Ur Experimental 0.1 U/Utip Ur Star-CCM+ 0 STAR-CCM+ -0.1 Utheta Experimental -0.2 STAR-CCM+ -0.3 -0.4 -0.5 0 0.5 1 r/R
Gas-liq liquid uid stir irred red vessel el - ICI I mix ixer er Ga Gas-liquid liquid syste stem D=2ft, t, toris isphe pheric rical al base D 3 im impell ller ers g 4bla lade de PBT up pumpin ing g d=0.5D .5D 2 Rushto hton n turbine ines s d=0.5D 5D C1/D=0.3 =0.3,C ,C2/D=0 2/D=0.64 .64, , C3/D= D=0.9 0.96 6 4 baffle fles, s, N=280 0 rpm 2 gas sparge rgers rs lo located ted between een C3 C3 PBT and lo lower Rushton hton turbine ine Liq iquid: id: Water er Gas: : Air ir, C2 C2 superfi erficial cial gas veloc locity: ity: C1 C1 0.0184 184-0.2 0.201 01 m/s
Liquid uid veloc ocity ity and gas volume ume fracti tion on Gas super erficial ficial veloc ocit ity 0.201 01 m/s
Gas caviti ties es behind nd imp mpeller eller paddles les Upper Rusht hton on turbine ne Lower Rusht hton on turbine ne PBT PBT Gas super erficial ficial veloc ocit ity 0.201 01 m/s
Effects cts of increasing easing gas injection ection rate Gas super erfi fici cial al veloc locity ty: U=0.0184 0184 m/s U=0.0448 0448 m/s U=0.201 201 m/s U=0.1175 1175 m/s U=0.0835 0835 m/s
Compari parison on of gas holdup up 50 45 40 35 Gas holdup [%] 30 25 Experimental Star-CCM+ STAR-CCM+ 20 15 10 5 0 0 0.05 0.1 0.15 0.2 0.25 Superficial velocity [m/s]
Int nter erph phase ase transf ansfer er of chemica ical l species cies in n STAR-CCM+ CM+ v7.02 Al Allow w chemica emical l species cies transf nsfer er betw etwee een n phases: es: gas disso solving ving into o liqui uid, d, gas release lease from om liqui uid. d. Aimed Ai ed for chem emica cal, l, process cess, , oil & gas, water er, , food od... ... Ap Applications ations: : bub ubble ble columns mns in chemica emical l process cess, , aerati tion on tanks ks in water er treat atme ment, nt, gas release lease in oil & gas riser ers, s, aerati tion on in bio-react reactor ors... s...
Oxyge gen n transf nsfer er in n aeration ation tank nk in n water er treatm eatmen ent Volu lume me fraction ction of a air ir Oxyg ygen n in in a air ir Water er Air injec jector or Oxygen level at water r surface face and Oxyg ygen n in in w water er exit
Gr Granular nular flow model el in n STAR AR-CCM+ -CCM+ v7.04 Kinetic tic theor eory y mode del for r granular r flows. ws. Par Particle cle-pa particle ticle collis isions ions repre resent sented d by a granular r temperature perature equa uati tion on deri rived ed from om kine neti tic theor eory. Sui uitable able for dense nse particle cle flows ws suc uch as flui uidi dise sed d beds ds. Ai Aimed ed for chem emica cal, l, process cess, , oil & gas, water er, , food od, , ceme ment, nt, minera neral, l, pharma rmace ceuti utical, cal, agricultura ultural.. l... Ap Applications ations: : flui uidis dised ed bed d react ctor ors, s, sand d and slur urry y transp spor orts ts, solid id handl ndling... ing...
Flui uidised dised be bed
Summa ummary We will cont ntinue inue to validat ate e the e Eu Eulerian ian mul ultip ipha hase se (EM EMP) model odel against nst indust strial ial applications ations. We will cont ntinue inue to develop elop new w capabi bilities lities in STAR AR-CC CCM+ – Chemical reaction model (v7.04) – More turbulence model options (v7.04) – Multi-particle phases granular model (v7.06) – Coupling with liquid film model (v7.06) – Non-Newtonian model (v7.06) We will cont ntinue inue to imp mprove e us user r experi perienc ence e of the e mode dels – Robustness of models – Clear model description in user manual, tutorial examples
Recommend
More recommend
