Ansys 2024 Fluent Fluid Ukulinganisa Software Manual
ISAHLUKO SESI-2. ULENKO LOMDA WEPLATE
Iinjongo
- Ukudala ijometri kwi-Ansys Workbench ye-Ansys Fluent
- Ukumisela i-Ansys eFanelekileyo yeLaminar Steady 2D Planar Flow
- Ukuseta iMesh
- Ukukhetha iMida yoMda
- Ukubala izibalo
- Ukusetyenziswa kwePloti ukuJonga iSiphumo soMmandla oHambayo
- Thelekisa kunye neTheory Solution usebenzisa iMathematica Code
Inkcazo yengxaki
Kwesi sahluko, siza kusebenzisa i-Ansys Fluent ukufunda ukuhamba kwelaminar enamacala amabini kwipleyiti ethe tyaba ethe tyaba. Ubungakanani bepleyiti buthathwa njengento engapheliyo kwicala le-spanwise kwaye ngoko ke ukuhamba yi-2D endaweni ye-3D. Isantya sokungena kwipleyiti eyi-1 m ubude yi-5 m/s kwaye siya kusebenzisa umoya njengolwelo lokulinganisa i-laminar. Siya kumisela isantya seprofiles kunye nokucwangcisa i-profiles. Siza kuqala ngokudala ijometri efunekayo kukulinganisa.
Ukwazisa i-Ansys Workbench kunye nokuKhetha iFluent
- Qala ngokuphehlelela iAnsys Workbench. Cofa kabini kwi-Fluid Flow (Fluent) ebekwe phantsi kwe-Analysis Systems kwi-Toolbox.
Ukwazisa iAnsys DesignModeler
- Khetha iJiyometri phantsi kweProjekthi yeSchematic kwi-Ansys Workbench. Cofa ekunene kwijiyometri kwaye ukhethe iiPropati. Khetha uhlobo loHlalutyo lwe-2D phantsi koKhetho oluPhezulu lweJiyometri kwiiPropati zeSchematic A2: Ijiyometri. Cofa ekunene kwiJiyometri kwiProjekthi yeSchematic kwaye ukhethe Qalisa uYilo olutsha lweJiyometri yoYilo. Khetha iiYunithi >> iMillimeter njengeyunithi yobude kwimenyu kwiDesignModeler.
- Okulandelayo, siza kube sisenza ijometri kwiDesignModeler. Khetha i-XYPlane kuLuhlu loMthi kwicala lasekhohlo kwi-DesignModeler. Khetha Jonga kwi-Sketch Cofa kwi-Sketching tab kwi-Tree Outline kwaye ukhethe umgca
skSketchool. Zoba umgca oxwesileyo oyi-1,000 mm ubude ukusuka kwimvelaphi ukuya ekunene. Qinisekisa ukuba uno P kwimvelaphi xa uqala ukuzoba umgca. Kwakhona, qiniseka ukuba uno-H ecaleni komgca ukuze uxwese kwaye ube ngu-C ekupheleni komgca. Khetha iMilinganiselo phakathi kokhetho lokuKhetha. Cofa kumgca kwaye ufake ubude be-1000 mm. Zoba umgca othe nkqo ukuya phezulu kwi-100 mm ubude uqala ekupheleni komgca wokuqala othe tye. Qinisekisa ukuba uno P xa uqala umgca kunye no V ebonisa umgca othe nkqo. Qhubeka nomgca othe tye oyi-100 mm ubude ukuya ekhohlo ukusuka kwimvelaphi elandelwa ngomnye umgca othe nkqo oyi-100 mm ubude. Umgca olandelayo uya kuba tye kunye nobude be-100 mm ukusuka ekupheleni komgca othe nkqo wangaphambili kwaye uqondiswe ngakwesokudla. Ekugqibeleni, vala uxande nge-1,000-mm ubude bomgca othe tye oqala nge-100 mm ngaphezu kwemvelaphi kwaye uqondiswe ngakwesokudla.
- Cofa kwi-Modeling thebhu phantsi kweebhokisi zezixhobo ze-Sketching. Khetha Ingqikelelo >> Imiphezulu evela kwiziketshi kwimenyu. Lawula ukukhetha imiphetho emithandathu yoxande njengeZinto eziSiseko kwaye ukhethe Faka kwiiNkcukacha View. Cofa ku Yenza kwibar yesixhobo. Uxande uba ngwevu. Ukucofa ekunene kwifestile yemizobo khetha Sondeza ukuze Fit kwaye uvale iDesignModeler.
- Ngoku siza kucofa kabini kwiMesh phantsi kweProjekthi yeSchematic kwiAnsys Workbench ukuvula iMeshing window. Khetha iMesh kulwandlalo lwefestile yeMeshing. Cofa ekunene kwaye ukhethe ukuvelisa iMesh. Umnatha orhabaxa wenziwa. Khetha IiNkqubo zeYunithi>>Metric (mm, kg, N ...) ukusuka ezantsi kwifestile yemizobo. Khetha uMesh >> Izilawuli>>Face Meshing kwimenyu. Cofa kwindawo emthubi ecaleni kweJiyometri phantsi koMda kwiiNkcukacha zoBuso bokuMeshing. Khetha uxande kwifestile yemizobo. Cofa kwiqhosha elithi Faka isicelo kwiJiyometri kwiiNkcukacha ze "Face Meshing". Khetha iMesh >> Izilawuli >> Ubungakanani kwimenyu kwaye ukhethe uEdge ngaphezulu kwefestile yemizobo. Khetha imiphetho emi-6 yoxande. Cofa kwi-Faka isicelo seJiyometri "kwiiNkcukacha zobungakanani boMda". Ngaphantsi kweNgcaciso kwi "Iinkcukacha zoMda we-Edge", khetha ubungakanani be-Element njengoHlobo, i-1.0 mm yoBukhulu be-Element, i-Curvature Capture njenge-No, kunye ne-Hard as Behaviour. Khetha i-Bias Type yesibini kwaye ufake i-12.0 njenge-Bias Factor. Khetha umphetho omfutshane othe tyaba othe tyaba kwaye Faka lo mngcipheko ngeReverse Bias. Cofa kwiKhaya>>Velisa iMesh kwimenyu kwaye ukhethe iMesh kuLuhlu. Umnatha ogqityiweyo uboniswa kwifestile yemizobo.
Kutheni le nto sidale umnatha onomkhethe?
Ngoku siza kuthiya ngokutsha imiphetho yoxande. Khetha isiphelo sasekhohlo soxande, cofa ekunene kwaye ukhethe Yenza Ukhetho Olunegama.
Ngenisa i-inlet njengegama kwaye ucofe iqhosha lika-OK. Phinda eli nyathelo kumphetho othe nkqo woxande kwaye ufake igama lokuphuma. Yenza ukhetho olunegama lomphetho osezantsi othe tye othe tye kwaye uyibize ngodonga. Okokugqibela, lawula-khetha imiphetho emithathu ethe tyaba eseleyo kwaye uyithiye iindonga ezifanelekileyo. Udonga olufanelekileyo ludonga lwe-adiabatic kunye nodonga olungena-friction.
- Isizathu sokusebenzisa i-mesh ecalanye kukuba sifuna umnatha ocolekileyo kufutshane nodonga apho sineemitha zesantya ekuhambeni. Siphinde sabandakanya umnatha ocolekileyo apho umaleko womda uqala ukukhula kwipleyiti ecaba. Khetha File>> Thumela ngaphandle…>> Umnatha >> Ungeniso olucacileyo File>> Thumela ngaphandle kwimenyu. Khetha Gcina njengohlobo: FLUENT Ungeniso Files (*.msh). Ngenisa umda-umaleko-umnatha .msh i-s file igama kwaye ucofe kwi Gcina iqhosha. Khetha File>> Gcina iProjekthi kwimenyu. Xela iprojekthi umaleko woMda wePleti eSicaba. Vala ifestile ye-Ansys Meshing. Cofa ekunene kwiMesh kwiProjekthi yeSchematic kwaye ukhethe uHlaziyo.
Ukwazisa i-Ansys Fluent
- Unokuqala i-Fluent ngeendlela ezimbini ezahlukeneyo, ngokucofa kabini kwi-Setup phantsi kweProjekthi ye-Schematic kwi-Ansys Workbench okanye imowudi ezimeleyo esuka kwi-Fluent 2024 R1 kwifolda ye-app ye-Ansys 2024 R1. Kuya kufuneka ufunde i-mesh ukuba uqala i-Fluent kwimo ezimeleyo. Iadvantage yokuqalisa i-Ansys Ngokutyibilikayo kwimowudi ezimeleyo kukuba ungakhetha indawo yoMsebenzi wakho woLawulo apho zonke iziphumo. files iya kugcinwa, jonga umfanekiso 2.6a). Qalisa i-Dimension 2D kunye ne-Double Precision Solver ye-Fluent. Jonga Ukuchaneka kabini phantsi koKhetho. Cwangcisa inani leeNkqubo zeSombulula elilingana nenani leecores zekhompyutha. Ukujonga inani lee-cores ezibonakalayo, cofa i-Ctrl + Shift + Esc izitshixo ngaxeshanye ukuvula uMphathi woMsebenzi. Yiya kwithebhu yeNtsebenzo kwaye ukhethe i-CPU kwikholamu yasekhohlo. Uya kubona inani lee-core cores kwicala elingasezantsi lasekunene. Umfundi we-Ansys ulinganiselwe kubuninzi beenkqubo ezi-4 zokusombulula. Vala ifestile yoMphathi woMsebenzi. Cofa kwiqhosha lokuqala ukuze uqalise i-Ansys Fluent. Cofa u-Kulungile ukuvala ifestile yeSitshixo soTshintsho lokuziphatha ukuba iyavela.
Umzobo 2.6a) UkuQalisa ukuseta
Kutheni sisebenzisa ukuchaneka kabini?
Ukuchaneka kabini kuya kunika ubalo oluchaneke ngaphezu kokuchaneka okukodwa. - Jonga isikali somnatha ngokukhetha i-Scale… iqhosha phantsi kwe-Mesh ngokubanzi kwiPhepha loMsebenzi. Qinisekisa ukuba iDomain Extent ichanekile kwaye uvale ifestile yeScale Mesh.
- Cofa kabini kwiiModeli kunye neViscous (SST k-omega) phantsi koSeto kulwandlalo View. Khetha iLaminar njengeModeli yeViscous. Cofa u-Kulungile ukuvala ifestile. Cofa kabini kwiMiqathango yeMida phantsi koSeto kuLundlalo View. Cofa kabini kwindawo yokungena phantsi kweZowuni kwiPhepha loMsebenzi. Khetha iMisebenzi njengeNdlela yokuCacisa iSidlo kwaye usete i-X-Velocity [m/s] ukuya ku-5.
- Cofa kwi Faka iqhosha lilandelwa yi Vala iqhosha.
- Cofa kabini kwi-deal_wall phantsi kweZowuni. Jonga i-Shear ecacisiweyo njengeMeko ye-Shear kwaye ugcine amaxabiso angama-zero woxinzelelo lokucheba oluchaziweyo kuba udonga olufanelekileyo alukhubeki. Cofa kwi Faka iqhosha lilandelwa yi Vala iqhosha.
Kutheni le nto sikhethe iLaminar njengeModeli yeViscous?
Kwisantya esikhethiweyo sasimahla somlambo i-5 m/s inani le-Reynolds lingaphantsi kwama-500,000 ecaleni kwepleyiti kwaye ukuhamba ngoko ke i-laminar. Ukuhamba kwesiphithiphithi ecaleni kwepleyiti ecaba kwenzeka kumanani eReynolds angaphezu kwama-500,000. - Cofa kabini kwiiNdlela phantsi kweSicombululo kulwandlalo View. Khetha uMgangatho woxinzelelo kunye noMyalelo wokuQala oPhezulu weMomentum. Cofa kabini kwiiNqobo zoReferensi phantsi koSeto kuLulwandlalo View. Khetha Bala kwi-inlet kwiPhepha loMsebenzi.
Kutheni le nto sisebenzisa indlela yokuQala yoMyalelo oPhakamileyo weSithuba sokuLuleka kweMomentum?
Indlela yokuQala yoMyalelo oPhakamileyo ayichanekanga kangako kodwa idibana ngcono kunendlela yesiBini yoMyalelo oPhezulu. Yinto eqhelekileyo ukuqala nge-First Order Upwind method ekuqaleni kwezibalo kwaye uqhubeke ngeSecond Order Upwind method. - Cofa kabini kuKwazisa phantsi kweSicombululo kuLulwandlalo View, khetha ukuQalisa okuMgangatho, khetha Bala kwi-inlet, kwaye ucofe kwi Qalisa iqhosha.
- Cofa kabini kwiiMonister phantsi kweSicombululo kulwandlalo View. Cofa kabini kwiNtshiso phantsi kweeMoni ezikuLudwe View kwaye ngenisa i-1e-9 njengeNqobo yokuKhethekisa zonke iiNtsalela. Cofa kwi Kulungile iqhosha ukuvala ifestile. Khetha File>> Gcina iProjekthi kwimenyu. Khetha File>> Export >> Case... kwi menu. Gcina iCase File enegama leFlat Plate Boundary Layer. CAS.h5
Kutheni le nto siseta iNqobo yokugweba kwi-1e-9?
Ngokubanzi, okukhona isezantsi inqobo yokugweba, kokukhona ixesha lokubala liya kuthatha kwaye linike isisombululo esichanekileyo. Sibona kwi-Figure 2.12b) ukuba i-x-isantya kunye ne-y-velocity equations zineentsalela ezisezantsi kune-equation equation. Amathambeka eegophe ezishiyekileyo kuzo zontathu iiequations zimalunga nokufana kunye nentsingiselo ebukhali yokuhla. - Cofa kabini kwi-Run Calculation phantsi kweSolution kwaye ufake i-5000 yeNani lokuphindaphinda. Cofa kwiqhosha elithi Bala. Izibalo ziya kugqitywa emva kokuphindaphinda kwe-193, jonga uMzobo 2.12b). Cofa kwi Copy Screenshot of Active Window to Clipboard, bona Umfanekiso 2.12c). I-Scaled Residuals inokuncamatheliswa kuxwebhu lwe-Word.
I-Post-Processing
- Khetha iZiphumo ithebhu kwimenyu kwaye ukhethe Yenza >> Umgca/Rake… phantsi koMphezulu. Faka u-0.2 ku-x0 (m), 0.2 ku-x1 (m), 0 ku-y0 (m), kunye no-0.02 m ku-y1 (m). Ngenisa u-x=0.2m kwiGama loMphezulu oMtsha kwaye ucofe ku-Yenza. Phinda kwakhona eli nyathelo kathathu kwaye udale imigca emi nkqo ku-x=0.4m enobude obuyi-0.04 m, x=0.6m nobude obuyi-0.06 m, kunye no-x=0.8m ngobude obuyi-0.08 m. Vala ifestile.
- Cofa kabini kwi-Plots kunye ne-XY Plot phantsi kweZiphumo kuLwandlalo View. Susa uqwalaselo lweNdawo kwi-X Axis phantsi kweeNdlela zoKhetho kwaye ujonge indawo kwi-Y-axis. Seta uMkhombandlela wePlot ku-X ukuya ku-0 kunye no-1 we-Y. Khetha i-Velocity… kunye ne-X ye-Velocity njengoMsebenzi we-X we-Axis. Khetha imigca emine x=0.2m, x=0.4m, x=0.6m, kunye no-x=0.8m phantsi koMphezulu.
- Cofa kwi-Axes… iqhosha kwiSolulo XY yePlot window. Khetha i-X-Axis, sukukhangela i-Auto Range phantsi kweeKhetho, faka u-6 kuLuhlu oluPhezulu, khetha uhlobo oluphangaleleyo phantsi kweFomathi yeNombolo, kwaye usete Ukuchaneka ku-0. Cofa kwiqhosha elithi Faka. Khetha i-Y-Axis, sukukhangela i-Auto Range, faka i-0.01 ye-Maximum Range, khetha Uhlobo oluphangaleleyo phantsi kweFomathi yeNombolo, kwaye ucofe kwiqhosha elithi Faka. Vala ifestile yeezembe.
- Cofa kwi-Curves… iqhosha kwi-Solution XY Plot window. Khetha ipateni yokuqala phantsi kweSimbo somgca weCurve # 0. Khetha akukho Uphawu lweSimbo seMakisha kwaye ucofe kwi Faka iqhosha. Okulandelayo, khetha Ijika # 1, khetha iPateni elandelayo ekhoyo yeSimbo soMgca, akukho phawu lweSimbo seMakisha, kwaye ucofe kwi Faka iqhosha. Qhubeka le pateni yokukhetha kunye neegophe ezimbini ezilandelayo # 2 kunye # 3. Vala iiCurves - Isisombululo se-XY Plot window. Cofa kwi Gcina/Iplati iqhosha kwiSolulo XY Plot window kwaye Vala le festile. Cofa kwi Copy Screenshot of Active Window to Clipboard, bona Umfanekiso 2.16c).
I-XY Plot inokuncamathiselwa kuxwebhu lwe-Word. Khetha ithebhu echazwe nguMsebenzisi kwimenyu kunye nesiko phantsi kweMisebenzi yeNdawo. Khetha uMsebenzi othile woMmandla wokuSebenza kwimenyu eyehlayo ngokukhetha uMnatha... kunye noY-Lunxibelelanisa. Cofa ku-Khetha kwaye ufake inkcazo njengoko kubonisiwe kwi-Figure 2.16f). Kufuneka ukhethe uMnatha… kwaye X Nxulumanisa ukubandakanya u x ulungelelwaniso kwaye ugqibezele ingcaciso yomsebenzi wendawo. Ngenisa i-eta njengeGama loMsebenzi oMtsha, cofa kwi-Defi,ne, kwaye uvale ifestile. Phinda eli nyathelo ukwenza omnye umsebenzi wendawo yesiko. Ngeli xesha, sikhetha iVelocity… kunye ne-X Velocity njengeMisebenzi yaseNdawo kwaye ucofe kuKhetha. Gcwalisa iNkcazo njengoko kubonisiwe kuMfanekiso 2.16g) kwaye ngenisa u-u-yahlulwe-nge-freestream-isantya njengeGama leNtsha yoMsebenzi, nqakraza kwi-Def, enye, kwaye uvale ifestile.
Kutheni le nto sidale ulungelelwaniso olufanayo?
Kuvela ukuba ngokusebenzisa ulungelelwaniso olufanayo, i-velocity profiles kwizikhundla ezahlukeneyo ezilandelanayo ziyakuwa kwi velocity pro efanayofile ezimeleyo kwindawo yomlambo. - Cofa kabini kwi-Plots kunye ne-XY Plot phantsi kweZiphumo kuLwandlalo View. Seta u-X ukuya ku-0 kunye no-Y ukuya ku-1 njengoMkhombandlela weSiza. Susa uqwalaselo lweNdawo kwi-X ehamba phambili kwaye ungaqwalasela iNdawo kwi-Y-axis phantsi kweeKhetho. Khetha iMisebenzi yoMmandla wesiNtu kunye ne-eta yoMsebenzi we-Y-Axis kwaye ukhethe iMisebenzi yeSiko loMmandla kunye nolwahlulo-nge-freestream-isantya se-X-Axis Function. Beka i file blasius.dat kulawulo lwakho lokusebenza. Oku file inokukhutshelwa kwi sdcpublications.com phantsi ko Khuphela isithuba sale ncwadi. Jonga uMfanekiso 2.19 wekhowudi yeMathematica enokusetyenziswa ukuvelisa ithiyori yeBlasius velocity profile ngenxa yelaminar umda umaleko flow phezu kwepleyiti esicaba. Njenge exampLe, kule ncwadi isikhokelo esisebenzayo sithi didi:\Abasebenzisi\jmatsson. Cofa ku Layisha File. Khetha Files yohlobo: Zonke Files (*) kwaye ukhethe i file blasius.dat kuluhlu lwakho lokusebenza. Khetha imiphezulu emine x=0.2m, x=0.4m, x=0.6m, x=0.8m, kunye nelayishiweyo file Ithiyori.
Cofa kwi Axes... iqhosha. Khetha i-Y-Axis kwi-Axes-Solution XY Yeplati yefestile kwaye ungayikhangeli i-Auto. Uluhlu. Misela i-Minimum Range ukuya kwi-0 kunye ne-Maximum Range ukuya kwi-10. Misela uhlobo lokudada kunye nokuchaneka kwi-0 phantsi kweFomathi yeNombolo. Ngenisa isihloko se-Axis njenge-eta kwaye ucofe ku-Faka isicelo. Khetha i-X-Axis, sukukhangela i-Auto Range phantsi kweeKhetho, faka u-1.2 kuLuhlu oluPhezulu, khetha Uhlobo lwe-float phantsi kweFomathi yeNombolo, kwaye usete Ukuchaneka ku-1. Faka i-Axis Title njengo-u/U. Cofa ku Faka kwaye Vala ifestile. Cofa kwi-Curves… iqhosha kwi-Solution XY Plot window. Khetha ipateni yokuqala phantsi kweSimbo somgca weCurve # 0, bona uMfanekiso 2.16a). Khetha akukho phawu lweSimbo seMakisha kwaye ucofe kwi Faka iqhosha. Okulandelayo, t khetha iGosa # 1, khetha iPateni elandelayo ekhoyo yeSimbo soMgca, akukho phawu lweSimbo seMakisha, kwaye nqakraza kwi Faka iqhosha. Qhubeka le pateni yokukhetha kunye neegophe ezimbini ezilandelayo # 2 kunye # 3. Vala iiCurves - Isisombululo se-XY Plot window. Cofa kwi Gcina/Iplati iqhosha kwiSolulo XY Plot window kwaye uvale le festile.
- Cofa kwi Copy Screenshot of Active Window to Clipboard, bona Umfanekiso 2.16c). I-XY Plot inokuncamathiselwa kuxwebhu lwe-Word. Khetha ithebhu echazwe nguMsebenzisi kwimenyu nakwiSiko. Khetha umsebenzi othile wokuSebenza kwimenyu eyehlayo ngokukhetha iMesh… kwaye X-Coordinate. Cofa kwi-Khetha kwaye ufake inkcazo njengoko kuboniswe kuMfanekiso 2.17e). Ngenisa i-rex njengeGama loMsebenzi oMtsha, cofa ku-Chaza, kwaye Vala ifestile. Cofa kabini kwi-Plots kunye ne-Xplotsot phantsi kweZiphumo kuLulwandlalo View. Seta u-X ukuya ku-0 kunye no-Y ukuya ku-1 phantsi koMkhombandlela weSicwangciso.
Susa uqwalaselo lweNdawo kwi-X ehamba phambili kwaye ususa uqwalaselo Beka kwi-Y-axis phantsi kweeKhetho. Khetha i-Wall Fluxes kunye ne-Skin Friction Coefficient ye-Y-Axis Function kwaye ukhethe i-Custom Field Functions kunye ne-rex ye-XX-AxisFunction. Beka i file "I-Theoretical Skin Friction Coefficient" kwincwadi yakho yokusebenza. Cofa ku Layisha File. Khetha Files yohlobo: Zonke Files (*) kwaye ukhethe i file "I-Theoretical Skin Friction Coefficient". Khetha udonga phantsi kweSurfaces kunye nelayishiweyo file Ukukhuhlana kolusu ngaphantsi File Idatha. Cofa kwi-Axes… Iqhosha. Khangela i-X-Axis, khangela ibhokisi yeLog phantsi kweeKhetho, ngenisa i-Re-x njengeSihloko se-Axis, kwaye ungaqwalasela i-Auto. Uluhlu phantsi koKhetho seta Ubuncinci ukuya kwi-100 kunye ne-Maximum ukuya kwi-1000000. Cwangcisa uHlobo lokudada kunye nokuLuneleka ukuya ku-0 phantsi kweFomathi yeNombolo kwaye ucofe ku-Faka isicelo. Khangela i-Y-Axis, khangela ibhokisi yeLog phantsi kweeKhetho, ngenisa Cf-x njengeLeyibhile, kwaye ungaqwalasela i-Auto. Uluhlu, setha Ubuncinci ukuya kwi-0.001 kunye ne-Maximum ukuya kwi-0.1, setha Uhlobo lokudada, Ukuchaneka ukuya kwi-3, kwaye nqakraza kwi-Apply. Vala ifestile. Cofa ku Gcina/Iplati kwiSisombululo sePlot XY window. Cofa kwi-Curves… iqhosha kwi-Solution XY Plot window. Khetha ipateni yokuqala phantsi kwe-Lin. e Isimbo seCurve # 0. Khetha akukho phawu lweSimbo seMakisha kwaye ucofe kwi Faka iqhosha. NONE Vala iiCurves-Isisombululo XY Iplati yefestile. Cofa kwi Gcina/Iplati iqhosha kwiSolulo XY Plot window kwaye uvale le festile. Cofa kwi Copy Screenshot of Active Window to Clipboard, bona Figure 1c). I-XY Plot inokuncamathiselwa kuxwebhu lwe-Word.- Ithiyori
- Kwesi sahluko, sithelekise i-Ansys Fluent velocity profiles kunye nethiyori yeBlasius velocity profile Ukuhamba kwe-laminar kwi-flat plate. Siguqule udonga-oluqhelekileyo ulungelelwaniso olungalunganga lwaba lulungelelwaniso olufanayo lokuthelekisa iprofiles kwiindawo ezahlukeneyo zomlambo. Ulungelelwaniso oluyeleleneyo luchazwa apho u-y (m) eludonga-yesiqhelo ulungelelwaniso, luchazwa ngu
- apho u-y (m) ludonga-oluqhelekileyo ulungelelwaniso, i-U (m/s) yisantya somlambo simahla, x (m) ngumgama ukusuka kwimvelaphi yodonga kunye ) m2 /s) yi kinematic viscosity ye ulwelo. U (m/s) yi velocity free stream, x (m) ngumgama ukusuka kwimvelaphi streamwise eludongeni kunye m2 / s) yi kinematic viscosity ulwelo.
Sikwasebenzise isantya esingeyonxalenye yesantya se-streamwise u/U apho uyindawo yesantya se-dimensional pro.file.
U/U yacwangciswa ngokuchasene neAnsys Fluent velocity profiles xa kuthelekiswa nethiyori kaBlasiusfile kwaye zonke zawela kwigophe elifanayo ngokwenkcazo yokuzifanisa.
I-equation yomaleko weBlasius inikwe ngu
Ubunzima bomgca womda buchazwa njengomgama ukusuka eludongeni ukuya kwindawo apho isantya kwi-border layer sifikelele kwi-99% yexabiso lomlambo wamahhala.
Kumaleko we-laminar boundary orr sinale nkcazo yethiyori ilandelayo yokwahluka kobunzima bomaleko womda kunye nomgama ohamba ngokulandelelanayo x kunye nenombolo yeReynolds didi.
- Intetho ehambelanayo yobunzima bomaleko womda kumaleko womda onesiphithiphithi inikwa ngu
- I-coefficient ye-skin friction yengingqi ichazwa njengoxinzelelo lwe-shear yodonga lwendawo olwahlulwe luxinzelelo oluguquguqukayo.
- I-coefficient yethiyori ye-friction yendawo yokuhamba kwe-laminar inqunywe ngu
- kunye nokuhamba kwesiphithiphithi, sinobu budlelwane bulandelayo
Iimbekiselo
- I-Çengel, YA, kunye ne-Cimbala JM, i-Fluid Mechanics Basics and Applications, i-1st Edition, i-McGraw-Hill, i-2006.
- Richards, S., Cimbala, JM, Martin, K., ANSYS I-Workbench Tutorial - I-Boundary Layer kwi-Flat Plate, iYunivesithi yasePenn State, i-18 May 2010 Ukuhlaziywa.
- Schlichting, H., kunye noGersten, K., Ithiyori yoMaleko woMda, uHlelo lwe-8 oluHlaziyiweyo noLwandisiweyo, iSpringer, ngo-2001.
- I-White, i-FM, i-Fluid Mechanics, i-4th Edition, i-McGraw-Hill, i-1999.
Imithambo
- Sebenzisa iziphumo ezisuka kwi-Ansys Fluent simulation kwesi sahluko ukumisela ukutyeba komda umaleko kwiindawo ezijikelezayo njengoko kubonisiwe kwitheyibhile engezantsi. Gcwalisa iinkcukacha ezingekhoyo kwitheyibhile. Isantya soluhlu lomda kumgama ukusuka eludongeni olulingana nobukhulu bomaleko womda kunye ne-U yi-free stream velocity.
x (m) o (mm) Ukutyibilika
o (mm) Ithiyori
Umahluko wepesenti U 8 (Nksk)
U (Nksk)
v (m2/s)
Re x 0.2 .0000146 0.4 .0000146 0.6 .0000146 0.8 .0000146 - Guqula ubungakanani beelementi bube yi-2 mm kumnatha kwaye uthelekise iziphumo kwi-XY Plots ye-skin friction coefficient xa kuthelekiswa nenombolo ye-Reynolds enobukhulu be-elementi eyi-1 mm esetyenziswe kwesi sahluko. Thelekisa iziphumo zakho kunye nethiyori.
- Guqula isantya somsinga wasimahla ukuya kwi-3 m/s kwaye udale iPlot yeXY kubandakanya ipro yesantyafiles ku-x = 0.1, 0.3, 0.5, 0.7, kunye ne-0.9 m. Yenza enye iPloti yeXY enesantya esifana nesakhefiles ngeli xesha lisezantsi lesantya somlambo kwaye wenze iPlot ye-XY yomlinganiso wokukhuhlana kwesikhumba ngokuchasene nenombolo yeReynolds.
- Sebenzisa iziphumo ezisuka kwi-Ansys Fluent simulation kwi-Exercise 2.3 ukumisela ubungqingqwa bomaleko womda kwiindawo ezijikelezayo njengoko kubonisiwe kwitheyibhile engezantsi. Gcwalisa ulwazi olulahlekileyo kwitheyibhile.yisantya somgca womda kumgama ukusuka eludongeni olulingana nobukhulu bomgca womda kunye ne-U yi-free stream velocity.
x (m) o (mm) Ukutyibilika
o (mm) Ithiyori
Umahluko wepesenti U 8 (Nksk)
U (Nksk)
v (m2/s)
Re x 0.1 .0000146 0.2 .0000146 0.5 .0000146 0.7 .0000146 0.9 .0000146
Uluhlu loku-2.2 Ukuthelekisa phakathi kobuchule kunye nethiyori yobunzima bomaleko womda
Guqula isantya sojelo sasimahla kwixabiso elidweliswe kwitheyibhile engezantsi kwaye wenze iPlot yeXY equka isantyafiles ku-x = 0.2, 0.4, 0.6, kunye ne-0.8 m. Yenza enye iPloti yeXY enesantya esifana nesakhefiles yesantya sakho somsinga wasimahla kwaye wenze iPlot ye-XY yomlinganiso wokukhuhlana kolusu ngokuchasene nenombolo yeReynolds.
| Umfundi | X-Isantya U (Nksk) | Ubuninzi Uluhlu (Nksk) ngenxa X Isantya Iploti |
| 1 | 3 | 4 |
| 2 | 3.2 | 4 |
| 3 | 3.4 | 4 |
| 4 | 3.6 | 4 |
| 5 | 3.8 | 4 |
| 6 | 4 | 5 |
| 7 | 4.2 | 5 |
| 8 | 4.4 | 5 |
| 9 | 4.6 | 5 |
| 10 | 4.8 | 5 |
| 11 | 5.2 | 6 |
| 12 | 5.4 | 6 |
| 13 | 5.6 | 6 |
| 14 | 5.8 | 6 |
| 15 | 6 | 7 |
| 16 | 6.2 | 7 |
| 17 | 6.4 | 7 |
| 18 | 6.6 | 7 |
| 19 | 6.8 | 7 |
| 20 | 7 | 8 |
| 21 | 7.2 | 8 |
Khuphela iPDF: Ansys 2024 Fluent Fluid Ukulinganisa Software Manual