Ansys 2024 Fluent Fluid Simulation Software Manual
ISAHLUKO 2. FLAT PLATE BOUNDAR LAYER
Izinjongo
- Ukudala iJiyomethri ku-Ansys Workbench ye-Ansys Fluent
- Ukusetha i-Ansys Fluent ye-Laminar Steady 2D Planar Flow
- Isetha i-Mesh
- Ukukhetha Izimo Zemingcele
- Ukugijima Izibalo
- Ukusebenzisa Izakhiwo Ukuze Ubone Ngeso Lengqondo Inkambu Egelezayo Ephumayo
- Qhathanisa neTheoretical Solution usebenzisa iMathematica Code
Incazelo Yenkinga
Kulesi sahluko, sizosebenzisa i-Ansys Fluent ukutadisha ukugeleza kwe-laminar enezinhlangothi ezimbili epuleti eliyisicaba elivundlile. Usayizi wepuleti uthathwa njengongenamkhawulo ekuqondeni kwe-spanwise ngakho-ke ukugeleza kungu-2D esikhundleni se-3D. Ijubane lokungena lepuleti elide elingu-1 m lingu-5 m/s futhi sizobe sisebenzisa umoya njengoketshezi ekulingiseni kwe-laminar. Sizonquma i-velocity profiles bese uhlela uchwepheshefiles. Sizoqala ngokwakha i-geometry edingekayo ekufaniseni.
Kwethulwa i-Ansys Workbench bese ukhetha i-Fluent
- Qala ngokwethula i-Ansys Workbench. Chofoza kabili kokuthi Fluid Flow (Fluent) etholakala ngaphansi kwe-Analysis Systems in Toolbox.
Kwethulwa i-Ansys DesignModeler
- Khetha i-Geometry ngaphansi kwe-Project Schematic ku-Ansys Workbench. Chofoza kwesokudla kuJiyomethri bese ukhetha Izakhiwo. Khetha Uhlobo Lokuhlaziywa Kwe-2D ngaphansi Kwezinketho Ezithuthukisiwe Zejiyomethri Ezimpahleni Ze-Schematic A2: IJiyomethri. Chofoza kwesokudla kuJiyomethri ku-Project Schematic bese ukhetha okuthi Qalisa I-DesignModeler Geometry entsha. Khetha Amayunithi >> I-Millimeter njengeyunithi yobude kumenyu eku-DesignModeler.
- Okulandelayo, sizobe sidala i-geometry ku-DesignModeler. Khetha i-XYPlane Kuhlaka Lwesihlahla ngakwesokunxele ku-DesignModeler. Khetha Bheka ku-Sketch Chofoza kuthebhu ethi Sketching Ohlakeni Lwesihlahla bese ukhetha Umugqa
skSketchool. Dweba umugqa ovundlile ongu-1,000 mm ubude ukusuka kumsuka uye kwesokudla. Qiniseka ukuthi uno-P emsuka lapho uqala ukudweba umugqa. Futhi, qiniseka ukuthi uno-H eduze komugqa ukuze ube ovundlile kanye no-C ekupheleni komugqa. Khetha Ubukhulu ngaphakathi kwezinketho Zokudweba. Chofoza umugqa bese ufaka ubude obuyi-1000 mm. Dweba umugqa oqondile uye phezulu ngo-100 mm ubude kusukela ekugcineni komugqa wokuqala ovundlile. Qiniseka ukuthi uno-P lapho uqala umugqa kanye no-V obonisa umugqa oqondile. Qhubeka ngomugqa ovundlile ongu-100 mm ubude ukuya kwesokunxele ukusuka kumsuka olandelwa omunye umugqa oqondile ongu-100 mm ubude. Umugqa olandelayo uzoba ovundlile nobude obungu-100 mm oqala ekugcineni komugqa wangaphambili oqondile futhi uqondiswe kwesokudla. Ekugcineni, vala unxande ngomugqa ovundlile ubude ongu-1,000-mm oqala ngo-100 mm ngaphezu komsuka futhi uqondiswe kwesokudla.
- Chofoza ithebhu ye-Model ngaphansi kwe-Sketching Toolboxes. Khetha I-Concept >> Okungaphezulu ku-Sketches kumenyu. Lawula ukhethe amaphethelo ayisithupha kanxande njengezinto eziyisisekelo bese ukhetha Sebenzisa Ngemininingwane View. Chofoza okuthi Khiqiza kubha yamathuluzi. Unxande uba mpunga. Ngokuchofoza kwesokudla iwindi lezithombe khetha i-Zoom to Fit bese uvala i-DesignModeler.
- Manje sizochofoza kabili ku-Mesh ngaphansi kwe-Project Schematic ku-Ansys Workbench ukuze sivule iwindi le-Meshing. Khetha i-Mesh ku-Outline ye-Meshing window. Chofoza kwesokudla bese ukhetha Khiqiza Mesh. I-mesh emahhadla yenziwa. Khetha Amasistimu Eyunithi >> Imethrikhi (mm, kg, N ...) kusukela phansi kwewindi lezithombe. Khetha u-Mesh >> Izilawuli >> I-Face Meshing kusuka kumenyu. Chofoza indawo ephuzi eduze kweJiyomethri ngaphansi kwe-Scope in Details of Face Meshing. Khetha unxande efasiteleni lemifanekiso. Chofoza inkinobho ethi Faka isicelo kuJiyomethri Ngemininingwane ye-"Face Meshing". Khetha u-Mesh >> Izilawuli >> Ukulinganisa kusuka kumenyu bese ukhetha i-Edge ngenhla kwewindi lehluzo. Khetha amaphethelo angu-6 kanxande. Chofoza okuthi Faka isicelo seJiyomethri kokuthi “Imininingwane Yokulinganiswa Kwe-Edge”. Ngaphansi Kwencazelo kokuthi “Imininingwane Yosayizi Womphetho”, khetha Usayizi Wento Njengohlobo, 1.0 mm ngosayizi we-Element, Capture Curvature njengoNo, kanye Nokuqina Njengokuziphatha. Khetha uhlobo lwesibili lwe-Bias bese ufaka u-12.0 njenge-Bias Factor. Khetha umphetho ovundlile ongaphezulu omfishane bese usebenzisa lolu nqenqema nge-Reverse Bias. Chofoza Ekhaya>>Khiqiza i-Mesh kumenyu bese ukhetha i-Mesh ku-Outline. Imeshi eqediwe iboniswa efasiteleni lezithombe.
Kungani sidale i-mesh echemile?
Manje sesizoqamba kabusha amaphethelo kanxande. Khetha unqenqema lwesokunxele lukanxande, chofoza kwesokudla bese ukhetha okuthi Dala Okukhethiwe Okuqanjiwe.
Faka i-inlet njengegama bese uchofoza inkinobho ethi OK. Phinda lesi sinyathelo emphethweni oqondile oqondile wonxande bese ufaka i-outlet yegama. Dala okukhethiwe okunegama lomphetho ophansi ovundlile ongezansi futhi ukubize ngodonga. Okokugcina, lawula-khetha imiphetho emithathu evundlile esele futhi uyiqambe izindonga ezifanele. Udonga olukahle luwudonga lwe-adiabatic nolungenawo ukungqubuzana.
- Isizathu sokusebenzisa i-mesh echemile ukuthi sidinga i-mesh ecolekile eduze nodonga lapho sinemitha yesivinini ekugelezeni. Siphinde safaka nemeshi ecolekile lapho isendlalelo somngcele siqala ukukhula epuletini eliyisicaba. Khetha File>>Thekelisa…>>I-Mesh>>Okokufaka Okucacile File>> Khipha kusuka kumenyu. Khetha Londoloza njengohlobo: FLUENT Input Files (*.msh). Faka i-boundary-layer-mesh .msh the s file igama bese uchofoza inkinobho ethi Gcina. Khetha File>> Londoloza Iphrojekthi kumenyu. Qamba iphrojekthi Isendlalelo Somngcele We-Flat Plate. Vala iwindi le-Ansys Meshing. Chofoza kwesokudla ku-Mesh ku-Project Schematic bese ukhetha Buyekeza.
Kwethulwa i-Ansys Fluent
- Ungaqala i-Fluent ngezindlela ezimbili ezihlukene, ngokuchofoza kabili kokuthi Setha ngaphansi kwe-Project Schematic ku-Ansys Workbench noma imodi ezimele ukusuka ku-Fluent 2024 R1 kufolda yohlelo lokusebenza lwe-Ansys 2024 R1. Uzodinga ukufunda i-mesh uma uqala i-Fluent ngemodi ezimele. I-advantagUkuqala i-Ansys Fluent kwimodi ezimele ukuthi ungakhetha indawo yoHlelo Lokusebenza lwakho lapho konke okukhiphayo files izosindiswa, bheka Umfanekiso 2.6a). Yethula i-Dimension 2D kanye ne-Double Precision Solver ye-Fluent. Hlola Ukunemba Okubili ngaphansi kokuthi Izinketho. Setha inani le-Solver Processes elilingana nenani lama-cores ekhompyutha. Ukuze uhlole inani lama-cores aphathekayo, cindezela u-Ctrl + Shift + Esc kanyekanye ukuze uvule Isiphathi Somsebenzi. Iya kuthebhu yokusebenza bese ukhetha i-CPU kukholamu engakwesokunxele. Uzobona inombolo yama-cores angokwenyama ohlangothini olungezansi kwesokudla. Umfundi we-Ansys ukhawulelwe kuzinqubo ezi-4 zokuxazulula izinkinga. Vala iwindi lesiphathi somsebenzi. Chofoza inkinobho ethi Qala ukuze uqalise i-Ansys Fluent. Chofoza okuthi KULUNGILE ukuze uvale iwindi Lezinguquko Ezibalulekile Zokuziphatha uma livela.
Umfanekiso 2.6a) Kwethulwa Ukusethwa
Kungani sisebenzisa ukunemba okuphindwe kabili?
Ukunemba okukabili kuzonikeza izibalo ezinembe kakhulu kunokunemba okukodwa. - Hlola isikali semeshi ngokukhetha inkinobho ethi Isikali... ngaphansi kwe-Mesh Ngokujwayelekile Ekhasini Lomsebenzi. Qiniseka ukuthi I-Domain Extent ilungile futhi uvale iwindi le-Scale Mesh.
- Chofoza kabili kokuthi Amamodeli kanye ne-Viscous (SST k-omega) ngaphansi kokuthi Setha ku-Outline View. Khetha i-Laminar njengemodeli ye-Viscous. Chofoza okuthi KULUNGILE ukuze uvale iwindi. Chofoza kabili kokuthi Izimo Zemingcele ngaphansi kokuthi Setha Ohlakeni View. Chofoza kabili okokufaka ngaphansi kwe-Zone ekhasini Lomsebenzi. Khetha Izingxenye Njengendlela Yokucacisa Isivinini bese usetha i-X-Velocity [m/s] iye ku-5.
- Chofoza inkinobho ethi Faka kulandelwa inkinobho ethi Vala.
- Chofoza kabili ku-deal_wall ngaphansi kwe-Zones. Bheka I-Shear Ecacisiwe Njenge-Shear Condition futhi ugcine amanani anguziro wengcindezi yokugunda eshiwo njengoba udonga olufanele alukhuni. Chofoza inkinobho ethi Faka kulandelwa inkinobho ethi Vala.
Kungani sikhethe i-Laminar njenge-Viscous Model?
Ngesivinini esikhethiwe sokusakaza samahhala esingu-5 m/s inombolo ye-Reynolds ingaphansi kuka-500,000 eduze kwepuleti futhi ukugeleza ngakho-ke ku-laminar. Ukugeleza kweziyaluyalu kupuleti eliyisicaba kwenzeka ezinombolweni zikaReynolds ezingaphezu kuka-500,000. - Chofoza kabili kokuthi Izindlela ngaphansi kwesixazululo ku-Outline View. Khetha Okujwayelekile Kwengcindezi kanye ne-Oda Yokuqala Ephezulu Ye-Momentum. Chofoza kabili kokuthi Amanani Okuyisethenjwa ngaphansi kokuthi Setha ku-Outline View. Khetha u-Computer kusuka kokungenayo ekhasini Lomsebenzi.
Kungani sisebenzisa indlela ye-First Order Upwind ye-Spatial Discretization of Momentum?
Indlela ye-First Order Upwind ngokuvamile ayinembile kangako kodwa ihlangana kangcono kunendlela ye-Second Order Upwind. Kuwumkhuba ojwayelekile ukuqala ngendlela ye-First Order Upwind ekuqaleni kwezibalo bese uqhubeka nendlela ye-Second Order Upwind. - Chofoza kabili kokuthi Ukuqalisa ngaphansi Kwesixazululo Kuhlaka View, khetha Ukuqalisa Okujwayelekile, khetha Bala ku-inlet, bese uchofoza inkinobho ethi Qalisa.
- Chofoza kabili kokuthi Ama-Monitors ngaphansi kwesixazululo ku-Outline View. Chofoza kabili kokuthi Okusele ngaphansi Kwabaqaphi ku-Outline View bese ufaka u-1e-9 njengeNqubomgomo Ephelele yazo zonke Izinsalela. Chofoza inkinobho ethi OK ukuze uvale iwindi. Khetha File>> Londoloza Iphrojekthi kumenyu. Khetha File>>Thekelisa>>Ikesi… kusuka kumenyu. Londoloza Icala File enegama I-Flat Plate Boundary Layer. I-CAS.h5
Kungani simise Imibandela Ephelele yaba ngu-1e-9?
Ngokuvamile, lapho imibandela ephansi yehla, isikhathi sokubala sizothatha isikhathi eside futhi sinikeze isisombululo esinembe kakhudlwana. Sibona kuMfanekiso 2.12b) ukuthi izibalo ze-x-velocity kanye ne-y-velocity zinezinsalela eziphansi kune-equation yokuqhubeka. Imithambeka yamajika ayinsalela awo womathathu amazibalo acishe afane nethrendi ebukhali eya phansi. - Chofoza kabili kokuthi Run Calculation ngaphansi kwesixazululo bese ufaka u-5000 ukuze uthole Inombolo Yokuphindaphinda. Chofoza inkinobho ethi Bala. Izibalo zizoqedwa ngemva kokuphindaphinda okungu-193, bheka uMdwebo 2.12b). Chofoza kokuthi Kopisha Isithombe-skrini Sewindi Elisebenzayo ebhodini lokunamathisela, bona Umfanekiso 2.12c). I-Scaled Residuals inganamathiselwa kudokhumenti ye-Word.
Ngemuva kokucubungula
- Khetha ithebhu ethi Imiphumela kumenyu bese ukhetha Dala >> Ulayini/Rake… ngaphansi kobuso. Faka u-0.2 we-x0 (m), 0.2 we-x1 (m), 0 ngo-y0 (m), kanye no-0.02 m ngokungu-y1 (m). Faka u-x=0.2m ukuze uthole Igama Lendawo Entsha bese uchofoza okuthi Dala. Phinda lesi sinyathelo izikhathi ezintathu ngaphezulu bese udala imigqa eqondile kokuthi x=0.4m enobude obungu-0.04 m, x=0.6m nobude obungu-0.06 m, kanye no-x=0.8m nobude obungu-0.08 m. Vala iwindi.
- Chofoza kabili ku-Plots kanye ne-XY Plot ngaphansi Kwemiphumela Kuhlaka View. Susa ukumaka Indawo ku-X Axis ngaphansi kwezinketho bese ubheka Indawo ku-Y-eksisi. Setha Ukuqondiswa Kwesakhiwo ku-X kuya ku-0 kanye no-1 ku-Y. Khetha Isivinini… kanye ne-X Velocity njengomsebenzi we-X Axis. Khetha imigqa emine x=0.2m, x=0.4m, x=0.6m, kanye no-x=0.8m ngaphansi kwe-Surfaces.
- Chofoza inkinobho ye-Axes… efasiteleni le-Solution XY Plot. Khetha i-X-Axis, susa ukumaka i-Auto Range ngaphansi kwezinketho, faka u-6 ukuze uthole Ububanzi obukhulu, khetha Uhlobo Olujwayelekile ngaphansi kwefomethi yenombolo, bese usetha Ukunemba kube ngu-0. Chofoza inkinobho ethi Faka. Khetha i-Y-Axis, ungahloli i-Auto Range, faka u-0.01 ukuze uthole Ububanzi obukhulu, khetha Uhlobo Olujwayelekile ngaphansi kwefomethi yenombolo, bese uchofoza inkinobho ethi Faka. Vala iwindi le-Axes.
- Chofoza inkinobho ethi Curves… ewindini le-Solution XY Plot. Khetha iphethini yokuqala ngaphansi kweSitayela Somugqa Wejika # 0. Khetha ukuthi alukho Uphawu Lwesitayela Somaka bese uchofoza inkinobho ethi Faka. Okulandelayo, khetha Ijika # 1, khetha Iphethini elandelayo etholakalayo Yesitayela Somugqa, alukho Uphawu Lwesitayela Somaka, bese uchofoza inkinobho ethi Faka. Qhubeka nale phethini yokukhetha ngamajika amabili alandelayo # 2 kanye no-# 3. Vala Amajika - Iwindi Lesakhiwo Sesixazululo XY. Chofoza inkinobho ethi Gcina/Isakhiwo efasiteleni le-Solution XY Plot bese uvala leli windi. Chofoza kokuthi Kopisha Isithombe-skrini Sewindi Elisebenzayo ebhodini lokunamathisela, bona Umfanekiso 2.16c).
I-XY Plot inganamathiselwa kudokhumenti ye-Word. Khetha ithebhu Echazwe Umsebenzisi kumenyu futhi Ngokwezifiso ngaphansi Kwemisebenzi Yenkundla. Khetha umsebenzi othize we-Operand Field kumenyu yokudonsela phansi ngokukhetha i-Mesh… kanye ne-Y-Coordinate. Chofoza okuthi Khetha bese ufaka incazelo njengoba kukhonjisiwe kuMfanekiso 2.16f). Udinga ukukhetha u-Mesh… kanye no-X Coordinate ukuze ufake i-x coordinate futhi uqedele incazelo yomsebenzi wensimu. Faka i-eta njengeGama Lomsebenzi Omusha, chofoza okuthi Defi,ne, bese uvala iwindi. Phinda lesi sinyathelo ukuze udale omunye umsebenzi wenkambu yangokwezifiso. Kulokhu, sikhetha iVelocity… kanye ne-X Velocity njengeMisebenzi Yenkundla bese uchofoza kokuthi Khetha. Gcwalisa Incazelo njengoba kukhonjisiwe kuMfanekiso 2.16g) bese ufaka u-u-ihlukaniswe-nge-freestream-isivinini njengeGama Lomsebenzi Omusha, chofoza okuthi Def, okukodwa, bese uvala iwindi.
Kungani sidale ukuxhumanisa okufanayo?
Kuvele ukuthi ngokusebenzisa i-coordinate efana nayo, i-velocity profiles ezindaweni ezihlukene zokusakaza zizowa ku-velocity pro oyedwa ofana nayefile lokho okuzimele kundawo egelezayo. - Chofoza kabili ku-Plots kanye ne-XY Plot ngaphansi Kwemiphumela Kuhlaka View. Setha u-X uye ku-0 kanye no-Y abe ngu-1 njengesikhombisi-ndlela sesakhiwo. Susa ukumaka Indawo ku-X eksisi bese ususe ukumaka Indawo ku-Y-eksisi ngaphansi kwezinketho. Khetha Imisebenzi Yenkambu Yangokwezifiso bese u-eta Womsebenzi we-Y-Axis bese ukhetha Imisebenzi Yenkambu Yangokwezifiso kanye nesivinini esihlukaniswe nge-freestream Somsebenzi we-X-Axis. Beka i- file blasius.dat ohlwini lwakho lokusebenza. Lokhu file ingalandwa ku-sdcpublications.com ngaphansi kwethebhu ethi Okulandiwe yaleli bhuku. Bheka uMdwebo 2.19 wekhodi yeMathematica engasetshenziswa ukukhiqiza i-theoretical Blasius velocity profile ngoba ungqimba lomngcele we-laminar lugeleza phezu kwepuleti eliyisicaba. Njengesiboneloample, kule ncwadi uhla lwemibhalo olusebenzayo luthi didi:\Users\jmatsson. Chofoza Layisha File. Khetha Files yohlobo: Konke Files (*) bese ukhetha i file blasius.dat ohlwini lwakho lokusebenza. Khetha izindawo ezine x=0.2m, x=0.4m, x=0.6m, x=0.8m, kanye nokulayishiwe file Ithiyori.
Chofoza inkinobho ye-Axes…. Khetha i-Y-Axis efasiteleni le-Axes-Solution XY Plot bese ususa ukumaka okuzenzakalelayo. Ibanga. Setha Ububanzi Obuncane bufike ku-0 kanye Nobukhulu Ububanzi bufike ku-10. Setha Uhlobo ukuze luntante futhi Lunembe lube ngu-0 ngaphansi Kwefomethi Yenombolo. Faka Isihloko se-Axis njenge-eta bese uchofoza okuthi Faka. Khetha i-X-Axis, susa ukumaka i-Auto Range ngaphansi kwezinketho, faka u-1.2 ukuze uthole Ububanzi obukhulu, khetha Uhlobo lwe-float ngaphansi kwefomethi yeNombolo, bese usetha Ukunemba kube ngu-1. Faka Isihloko se-eksisi njengo-u/U. Chofoza okuthi Faka isicelo bese uvala iwindi. Chofoza inkinobho ethi Curves… ewindini le-Solution XY Plot. Khetha iphethini yokuqala ngaphansi kweSitayela Somugqa Wejika # 0, bheka Umfanekiso 2.16a). Khetha ukuthi alukho Uphawu Lwesitayela Somaka bese uchofoza inkinobho ethi Faka. Okulandelayo, khetha Ijika # 1, khetha Iphethini elandelayo etholakalayo Yesitayela Somugqa, alukho Uphawu Lwesitayela Somaka, bese uchofoza inkinobho ethi Faka. Qhubeka nale phethini yokukhetha ngamajika amabili alandelayo # 2 kanye no-# 3. Vala Amajika - Iwindi Lesakhiwo Sesixazululo XY. Chofoza inkinobho ethi Gcina/Isakhiwo efasiteleni le-Solution XY Plot bese uvala leli windi.
- Chofoza kokuthi Kopisha Isithombe-skrini Sewindi Elisebenzayo ebhodini lokunamathisela, bona Umfanekiso 2.16c). Isakhiwo se-XY singanamathiselwa kudokhumenti ye-Word. Khetha ithebhu echazwe umsebenzisi kumenyu kanye nokuthi Ngokwezifiso. Khetha umsebenzi othize we-Operand kumenyu yokudonsela phansi ngokukhetha i-Mesh… kanye ne-X-Coordinate. Chofoza okuthi Khetha bese ufaka incazelo njengoba kukhonjisiwe kuMfanekiso 2.17e). Faka i-rex njengeGama Lomsebenzi Omusha, chofoza ku-Define, bese uvala iwindi. Chofoza kabili ku-Plots kanye ne-XPlotsot ngaphansi Kwemiphumela Ku-Outline View. Setha i-X ibe ngu-0 kanye no-Y ibe ngu-1 ngaphansi kwesikhombisi-ndlela sesakhiwo.
Susa ukumaka Indawo ku-X eksisi bese ususe ukumaka Beka ku-Y-eksisi ngaphansi kwezinketho. Khetha i-Wall Fluxes kanye ne-Skin Friction Coefficient Yomsebenzi we-Y-Axis bese ukhetha Imisebenzi Yenkambu Yangokwezifiso kanye ne-rex ye-XX-AxisFunction. Beka i- file "I-Theoretical Skin Friction Coefficient" kumkhombandlela wakho osebenzayo. Chofoza Layisha File. Khetha Files yohlobo: Konke Files (*) bese ukhetha i file "I-Theoretical Skin Friction Coefficient". Khetha udonga ngaphansi kwe-Surfaces kanye nokulayishiwe file I-Skin Friction ngaphansi File Idatha. Chofoza Izimbazo... Inkinobho. Hlola i-X-Axis, qoka ibhokisi elithi Ngena ngaphansi kwezinketho, faka i-Re-x njengesihloko se-Axis, bese ususa ukumaka okuzenzakalelayo. Ibanga ngaphansi kokuthi Inketho setha Okuncane kuye ku-100 futhi Okuphezulu kube ku-1000000. Misa Uhlobo ukuze luntante futhi Ukunemba lube ngu-0 ngaphansi kwefomethi Yenombolo bese uchofoza okuthi Faka. Hlola i-Y-Axis, qoka ibhokisi elithi Ngena ngaphansi kwezinketho, faka u-Cf-x njengelebula, bese ususa ukumaka Okuzenzakalelayo. Ibanga, setha Okuncane kube ku-0.001 kanye no-Maximum kube ngu-0.1, setha Uhlobo ukuze luntante, Ukunemba kube ku-3, bese uchofoza okuthi Faka. Vala iwindi. Chofoza okuthi Gcina/Isakhiwo efasiteleni le-Solution XY Plot. Chofoza inkinobho ethi Curves… ewindini le-Solution XY Plot. Khetha iphethini yokuqala ngaphansi kwe-Lin. e Isitayela Sejika # 0. Khetha ukuthi alukho Uphawu Lwesitayela Somaka bese uchofoza inkinobho ethi Faka. Cha,xt khetha Ijika # 1, khetha Iphethini elandelayo etholakalayo Yesitayela Somugqa, alukho Uphawu Lwesitayela Somaka, bese uchofoza inkinobho ethi Faka. Vala iwindi le-Curves - Solution XY Plot. Chofoza inkinobho ethi Gcina/Isakhiwo efasiteleni le-Solution XY Plot bese uvala leli windi. Chofoza kokuthi Kopisha Isithombe-skrini Sewindi Elisebenzayo ebhodini lokunamathisela, bona Umfanekiso 2.16c). I-XY Plot inganamathiselwa kudokhumenti ye-Word.- Ithiyori
- Kulesi sahluko, siqhathanise i-Ansys Fluent velocity profiles nge-theoretical Blasius velocity profile ukugeleza kwe-laminar epuleti eliyisicaba. Siguqule i-wall-normal mal coordinate yaba ukuhlanganisa okufanayo ukuze kuqhathaniswe ne-profileezindaweni ezahlukene zokusakaza. Isixhumanisi sokufana sichazwa lapho u-y (m) engudonga olujwayelekile lokuxhumanisa, kuchazwa ngokuthi
- lapho u-y (m) engudonga olujwayelekile lokuxhumanisa, i-U (m/s) iyijubane lokugeleza lamahhala, u-x (m) ibanga ukusuka kumsuka ogelezayo wodonga kanye ) m2 /s) i-kinematic viscosity uketshezi. U-U (m/s) isivinini somfudlana samahhala, u-x (m) ibanga ukusuka kumsuka ogelezayo wodonga kanye ne-m2 /s) yi-kinematic viscosity yoketshezi.
Siphinde sasebenzisa i-non-dimensional streamwise velocity u/U lapho u-dimensional velocity profile.
i-u/U yahlelwa iqhathaniswa ne-Ansys Fluent velocity profiles uma kuqhathaniswa nethiyori ka-Blasiusfile futhi zonke zigoqeke ngejika elifanayo ngokwencazelo yokufana kwakho.
Isibalo sesendlalelo somngcele we-Blasius sinikezwa ngu
Ugqinsi lwesendlalelo somngcele luchazwa njengebanga elisuka odongeni ukuya endaweni lapho isivinini sesendlalelo somngcele sifinyelele ku-99% yenani lokusakaza lamahhala.
Okwesendlalelo somngcele we-laminar sinenkulumo yethiyori elandelayo yokuhluka kogqinsi longqimba lomngcele ngebanga eligelezayo elingu-x kanye nenombolo ye-Reynolds engu-3.
- Isisho esihambisanayo sokujiya kwesendlalelo somngcele kusendlalelo somngcele onesiyaluyalu sinikezwa ngu
- I-coefficient yendawo yokungqubuzana kwesikhumba ichazwa njengengcindezi yendawo yokugunda odongeni ehlukaniswe ingcindezi eguquguqukayo.
- I-coefficient yendawo yethiyori yokungqubuzana kokugeleza kwe-laminar inqunywa ngu
- kanye nokugeleza kwesiyaluyalu, sinobudlelwano obulandelayo
Izithenjwa
- I-Çengel, YA, kanye ne-Cimbala JM, I-Fluid Mechanics Fundamentals and Applications, i-1st Edition, McGraw-Hill, 2006.
- Richards, S., Cimbala, JM, Martin, K., ANSYS Workbench Tutorial – Boundary Layer on a Flat Plate, Penn State University, 18 May 2010 Revision.
- Schlichting, H., kanye noGersten, K., I-Boundary Layer Theory, i-8th Revised and Enlarged Edition, Springer, 2001.
- White, FM, Fluid Mechanics, 4th Edition, McGraw-Hill, 1999.
Ukuvivinya umzimba
- Sebenzisa imiphumela evela kukulingisa kwe-Ansys Fluent kulesi sahluko ukuze unqume ukujiya kwesendlalelo somngcele ezindaweni ezigelezayo njengoba kukhonjisiwe kuthebula elingezansi. Gcwalisa imininingwane engekho kuthebula. I-digiti isivinini sesendlalelo somngcele ebangeni elisuka odongeni elilingana nogqinsi lwesendlalelo somngcele futhi u-U isivinini somfudlana samahhala.
x (m) o (mm) Ukuqephuza
o (mm) Ithiyori
Umehluko Wamaphesenti U 8 (m/s)
U (m/s)
v (m2/s)
Re x 0.2 .0000146 0.4 .0000146 0.6 .0000146 0.8 .0000146 - Shintsha usayizi we-elementi ube ngu-2 mm we-mesh futhi uqhathanise imiphumela kokuthi XY Plots ye-coefficient yesikhumba uma kuqhathaniswa nenombolo ka-Reynolds enosayizi we-elementi ongu-1 mm osetshenziswe kulesi sahluko. Qhathanisa imiphumela yakho nethiyori.
- Shintsha isivinini sokusakaza samahhala sibe ngu-3 m/s futhi udale i-XY Plot efaka i-velocity profiles ku-x = 0.1, 0.3, 0.5, 0.7, kanye no-0.9 m. Dala esinye i-XY Plot nge-velocity pro ozifanisela yonafiles kule sivinini esiphansi sokusakaza samahhala futhi udale Isiqephu se-XY se-coefficient yokungqubuzana kwesikhumba uma kuqhathaniswa nenombolo kaReynolds.
- Sebenzisa imiphumela evela ekulingiseni i-Ansys Fluent ku-Exercise 2.3 ukuze unqume ukujiya kwesendlalelo somngcele ezindaweni ezilandelanayo njengoba kuboniswe kuthebula elingezansi. Gcwalisa imininingwane engekho kuthebula.isivinini sesendlalelo somngcele ebangeni elisuka odongeni elilingana nogqinsi longqimba lomngcele futhi u-U yijubane lokusakaza lamahhala.
x (m) o (mm) Ukuqephuza
o (mm) Ithiyori
Umehluko Wamaphesenti U 8 (m/s)
U (m/s)
v (m2/s)
Re x 0.1 .0000146 0.2 .0000146 0.5 .0000146 0.7 .0000146 0.9 .0000146
Ithebula 2.2 Ukuqhathanisa phakathi kwe-Fluent kanye nethiyori yogqinsi lwesendlalelo somngcele
Shintsha isivinini sokusakaza samahhala sibe yinani elisohlwini lwethebula elingezansi bese udala i-XY Plot okuhlanganisa i-velocity profiles ku-x = 0.2, 0.4, 0.6, kanye no-0.8 m. Dala esinye i-XY Plot nge-velocity pro ozifanisela yonafiles ngesivinini sakho sokusakaza samahhala futhi udale Isakhiwo se-XY se-coefficient yokungqubuzana kwesikhumba uma kuqhathaniswa nenombolo kaReynolds.
| Mfundi | I-X-Velocity U (m/s) | Ubuningi Ibanga (m/s) okwe X Isivinini Isakhiwo |
| 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 |
Landa i-PDF: Ansys 2024 Fluent Fluid Simulation Software Manual