Florida Institute of Technology purofesa ari kubuda Martin Glicksman tsvagiridzo yazvino pamusoro pesimbi uye zvinhu zvine zvazvinoreva kuindasitiri yevakatanga, asi zvakare ine yakadzika hukama pachedu nekufemerwa kwevanoshanda navo vaviri vakafa.googletag.cmd.push(basa() {googletag.display('div-gpt-ad-1449240174198-2′);});
Chidzidzo chaGliksman "Surface Laplacian of the interfacial thermochemical potential: basa rayo mukuumbwa kwehurumende yezvikamu zvakasimba uye zvemvura" inobudiswa mumagazini yaNovember yemagazini yakabatanidzwa Springer Nature Microgravity.Zvakawanikwa zvinogona kutungamira mukunzwisisa kuri nani kwekusimbiswa kwesimbi castings, zvichibvumira mainjiniya kuvaka injini dzinogara kwenguva refu uye ndege dzakasimba, uye kufambisira mberi kugadzirwa kwekuwedzera.
"Paunofunga nezvesimbi, aruminiyamu, mhangura - zvese zvakakosha zveinjiniya, kukanda, welding uye kugadzirwa kwesimbi yekutanga - aya maindasitiri emabhiriyoni emadhora ane kukosha kukuru munharaunda," akadaro Glicksman."Uchanzwisisa kuti tiri kutaura nezvezvinhu, uye kunyangwe kuvandudzwa kudiki kunogona kuve kwakakosha."
Sezvinongoita mvura inoumba makristasi kana yaoma chando, chimwe chinhu chakafanana chinoitika apo simbi yakanyungudutswa yakanyungudutswa inoomesa kuita simbi.Tsvagiridzo yaGliksman inoratidza kuti panguva yekuomeswa kwesimbi alloys, kushushikana kwepasi pakati pekristaro nekunyunguduka, pamwe nekuchinja mukukombama kwekristaro sezvainokura, kunokonzera kupisa kwemhepo kunyangwe kune yakatarwa nzvimbo.Iyi mhedziso yakakosha yakanyatsosiyana kubva kune huremu hweStefan hunowanzoshandiswa mudzidziso yekukanda, umo simba rekupisa rinoburitswa nekristaro rinokura rinoenderana nekukura kwayo.
Gliksman akacherekedza kuti kupeta kwekristaro kunoratidza kugona kwayo kwekemikari: curvature yakakomberedzwa inodzikisa zvishoma nzvimbo yakanyungudika, nepo concave curvature ichisimudza zvishoma.Izvi zvinonyatsozivikanwa mu thermodynamics.Chii chitsva uye chakatoratidzwa ndechekuti iyi curvature gradient inokonzera kuwedzera kwekupisa panguva yekusimba, iyo isina kuverengerwa mune yechinyakare dzidziso yekukanda.Mukuwedzera, izvi zvinopisa zvinoyerera "zvinoita" uye kwete zvisizvo, semhere-mhere, iyo inogona kunyatsogadziriswa panguva yekukanda kushandura microstructure yealloy uye kugadzirisa zvinhu.
"Kana iwe uine chando chakaoma checrystalline microstructures, pane curvature-induced heat flux inogona kudzorwa," Gliksman akadaro."Kana ichidzorwa nemakemikari ekuwedzera kana mhedzisiro yemuviri senge kudzvanywa kana simba remagineti, uku kupisa kunoyerera mune chaiyo alloy castings kunogona kuvandudza iyo microstructure uye pakupedzisira kudzora akakanda alloys, akaiswa welded, uye kunyange 3D zvakadhindwa."
Pamusoro pekukosha kwayo kwesainzi, chidzidzo ichi chaive chakakosha pachezvake kuna Glixman, tinotenda zvikuru nerutsigiro runobatsira rwemumwe waanoshanda naye akanonoka.Mumwe waaishanda naye akadaro aive Paul Steen, purofesa wefluid mechanics paCornell University, akafa gore rapfuura.Makore mashoma apfuura, Steen akabatsira Glicksman mukutsvagisa kwake pazvinhu zviri mumicrogravity achishandisa space shuttle fluid mechanics netsvakiridzo yemidziyo.Springer Nature yakatsaurira yaNovember chinyorwa cheMicrogravity kuna Steen uye akabata Gliksman kuti anyore chinyorwa chesainzi nezve chidzidzo mukukudzwa kwake.
“Izvozvo zvakandisunda kubatanidza chimwe chinhu chinofadza icho Paul aizoonga zvikuru.Ehe, vaverengi vazhinji veichi chinyorwa chekutsvagisa vanofarirawo nzvimbo yakapihwa naPauro, inova interface thermodynamics, "Gliksman akadaro.
Mumwe waaishanda naye akafuridzira Gliksman kuti anyore chinyorwa ichi ndiSemyon Koksal, purofesa wemasvomhu, mukuru wedhipatimendi uye mutevedzeri wemutungamiri wezvedzidzo paFlorida Institute of Technology, akafa muna Kurume 2020. Gliksman akamurondedzera semunhu ane mutsa, akangwara uye ainakidzwa. kutaura naye, achiona kuti akamubatsira kushandisa ruzivo rwake rwemasvomhu mukutsvagisa kwake.
“Ini naye taiva shamwari dzepamwoyo uye aifarira chaizvo basa rangu.Semyon akandibatsira pandakagadzira maequation akasiyana kuti atsanangure kuyerera kwekushisa kunokonzerwa nekukombama, ”Gliksman akadaro.“Takapedza nguva yakawanda tichikurukura nezvemaequation angu uye magadzirirwo awo, zvaasingakwanisi, nezvimwewo. Ndiye ega munhu wandakabvunza uye akabatsira zvikuru mukugadzira dzidziso yemasvomhu nekundibatsira kuigadzirisa.”
Rumwe ruzivo: Martin E. Gliksman et al., Surface Laplacian yeiyo interfacial thermochemical inogona: basa rayo mukuumbwa kweiyo solid-liquid mode, npj Microgravity (2021).DOI: 10.1038/s41526-021-00168-2
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