Ukuthola inombolo Reynolds

Labo ababona neze physics, lunikezelwa. Qala umbhalo ngenye Angikwazi, ngoba isibalo Reynolds mathupha angizange zibangele noma iyiphi impendulo ingxenye ulwazi lapho ukugcina ukwaziswa physics. Ake sizame ukugcwalisa lokhu igebe.

Ukuxoxa ukucacisa lokho Osborne Reynolds kwaba ngesikhathi esisodwa ensimini yabo. Lokhu usosayensi kwaba kummeleli isiNgisi (ezinye imithombo - Irish) wezesayensi emkhakheni physics, i-engineering kanye hydraulics. Wazalelwa 1842, ngemva kweminyaka engu-28, waba uprofesa eMnyangweni Mechanics ezihlelekile Cambridge. ucwaningo wayo waholela ekubeni babheka ukuziphatha uketshezi laminar (egqinsiwe) kanye zeziyaluyalu (vortex) ukugeleza. Ukuthi kuyinto ukwabiwa ukufanelekela zezinombolo ngamatjhuguluko ngohlobo olulodwa Yiqiniso kwenye. Lokhu ubuningi yaziwa kithi njengoba inombolo Reynolds.

Lisho ukuthini igama elithi ka? Lokhu ipharamitha akuyona njalo futhi kuyinto isilinganiso esithile amabutho inertial nokungqubuzana yangaphakathi e ukugeleza ketshezi. Njengoba ubheke umbandela esetshenziswa Re. Ngokuphathelene inamaqoqo oku-linganisa ke lungekho khona, ngoba inombolo Reynolds ngoba amanzi, amagesi kanye nanoma yimiphi eminye lesifishane eliningi dimensionless (inombolo ngayinye se).

Ngokungangabazeki ufanelwe inhlonipho ukuphikelela IsiZulu usosayensi, okwadingeka ukuba uchithe ukuhlolwa ezingaphezu kwekhulu ukukhomba maqondana ezinjalo. Wakwazi ukubona iphethini elandelayo: ngamazinga aphezulu (ngaphezu kuka-2 - 3 million), ukugeleza kwamanzi kuyinto zeziyaluyalu ngokugcwele, futhi ezincane - laminar ngokuphelele.

Eziningi zalezi izibalo ubheke ukufundwa okuyinto zazitholakala empirically kuphela, futhi ushintshe noma ukuphindaphinda angapheleli "ziphume" ifremu wamanje. Nokho, abaningi ngempela ngempumelelo ukuzichaza ngokombono kwemithetho Newton. Ngamagama alula, ukusakaza uketshezi has a inertia ezithile futhi ivame ukuba silondoloze ukuhamba kwayo ngezinga elifanayo.

Ukubaluleka kwalokhu umbandela, ngokuvumelana data esuka emithonjeni ehlukahlukene, zibaluleke kakhulu. Kuyinto lesi silinganiso futhi isimiso ukukhiqizwa yayo lisitshela ukuthi umthelela imvelo (amanzi, igesi noma enye into) alikho ngempela kuncike ijubane, inertia nokungqubuzana, angakanani ekusebenzelaneni kwabo. Kuyinto lokhu ukuxhumana kanye kubonakala isilinganiso, okuthiwa "inombolo Reynolds". Ukuze amanzi, ukuhamba okuyinto eyenzeka eduze iziteshi ewumngcingo (noma amashubhu), "Edge" inkomba ngeke ukwedlulisela lingaphezulu inkomba 12000 - Ukumelana 20000. Ukwenyuka medium kuyokhula. NAMAMZI evulekile nangaphandle isithombe uzobe nabokhulumile: Ziyanda Reynolds amagugu kuzonciphisa ukumelana.
Ukusebenzisa kwakhe lokhu umbandela wayengekho kuphela Mechanics uketshezi, kodwa futhi zezindiza kanye shipbuilding. Ngokwesibonelo, kuba inombolo Reynolds ivumela ukuhlolwa onokwethenjelwa onobuhle ezintsha izindiza, ukukhiqiza ngokugcwele isenzo wangempela ukugeleza komoya imodeli encishisiwe.

PS Wona ukubala ifomula engalethi ngenhloso: uma umfundi nesithakazelo kulesi sihloko, funda oda ukubala ezidlula ezinjalo ngeke kube nzima.