Florida Institute of Technology unjingalwazi ophumayo UMartin Glicksman uphando lwamva nje ngesinyithi kunye nemathiriyeli ineempembelelo kushishino lwesiseko, kodwa lukwanonxibelelwano olunzulu lobuqu kwimpefumlelo yabalingane ababini abangasekhoyo.googletag.cmd.push(umsebenzi () {googletag.display('div-gpt-ad-1449240174198-2′);});
Uphononongo lukaGliksman "I-Surface Laplacian ye-interfacial thermochemical potential: indima yayo ekubunjweni kolawulo lwezigaba eziqinileyo kunye ne-liquid" ipapashwe kwiphephancwadi likaNovemba lejenali edibeneyo Springer Nature Microgravity.Iziphumo zingakhokelela ekuqondeni ngcono ukuqina kwesinyithi, ukuvumela iinjineli ukuba zakhe iinjini ezihlala ixesha elide kunye neenqwelomoya ezomeleleyo, kunye nokuqhubela phambili ukwenziwa kokongeza.
"Xa ucinga ngentsimbi, i-aluminiyamu, ubhedu - zonke izinto ezibalulekileyo zobunjineli, ukuphosa, ukuwelda kunye nemveliso yentsimbi yokuqala - ezi ziibhiliyoni ezininzi zeedola ezixabisa kakhulu uluntu," utshilo uGlicksman."Uya kuqonda ukuba sithetha ngezinto ezisetyenziswayo, kwaye nophuculo oluncinci lunokubaluleka."
Kanye njengokuba amanzi ebumba iikristale xa engumkhenkce, kwenzeka into efanayo xa ingxubevange yesinyithi enyibilikisiweyo iqina ukuze yenze udaka.Uphando lukaGliksman lubonisa ukuba ngexesha lokuqiniswa kweealloys zetsimbi, ukunyanzeliswa komphezulu phakathi kwekristale kunye nokunyibilika, kunye notshintsho kwi-curvature yekristale njengoko ikhula, ibangela ukufudumeza kobushushu nakwiindawo ezisisigxina.Esi sigqibo sisisiseko sahluke kakhulu kubunzima beStefan obusetyenziswa rhoqo kwithiyori yokuphosa, apho amandla ashushu akhutshwa yikristale ekhulayo alingana ngokuthe ngqo nezinga lokukhula kwawo.
UGliksman waqaphela ukuba igophe lekristale libonisa amandla ayo ekhemikhali: i-convex curvature ithoba kancinci indawo yokunyibilika, ngelixa i-concave curvature iphakamisa kancinci.Oku kwaziwa kakuhle kwi-thermodynamics.Yintoni entsha kwaye sele ibonakaliswe kukuba le gradient ye-curvature ibangela ukushisa okongezelelweyo ngexesha lokuqina, okungazange kuthathelwe ingqalelo kwi-theory yendabuko yokuphosa.Ukongezelela, oku kufudumala kobushushu "ku-deterministic" kwaye akunanto i-random, njengengxolo engahleliweyo, eyona nto inokulawulwa ngempumelelo ngexesha lenkqubo yokuphosa ukutshintsha i-microstructure ye-alloy kunye nokuphucula iipropati.
“Xa unemikrozo engumkhenkce entsonkothileyo, kukho ubushushu obubangelwa kukugoba obunokulawulwa,” utshilo uGliksman."Ukuba ilawulwa zezongezo zekhemikhali okanye iziphumo zomzimba ezinje ngoxinzelelo okanye amandla emagnethi anamandla, oku kufudumeza kobushushu kwi-alloy castings yokwenyani kunokuphucula i-microstructure kwaye ekugqibeleni ilawule ialloys, izinto ezidityanisiweyo, kunye nezinto eziprintiweyo ze-3D."
Ukongeza kwixabiso lalo lesayensi, uphononongo lwalubaluleke kakhulu kuGlixman, enkosi kakhulu kwinkxaso eluncedo yomlingane ongasekhoyo.Omnye onjalo yayinguPaul Steen, unjingalwazi kwezobuchwephesha bolwelo kwiYunivesithi yaseCornell, osweleke kulo nyaka uphelileyo.Kwiminyaka embalwa edlulileyo, u-Steen wanceda uGlicksman kuphando lwakhe lwemathiriyeli kwi-microgravity esebenzisa ubuchwephesha be- shuttle fluid fluid kunye nophando lwemathiriyeli.I-Springer Nature yanikezela umba kaNovemba weMicrogravity kuSteen waza waqhagamshelana noGliksman ukuba abhale inqaku lesayensi malunga nokufunda ngembeko yakhe.
Oko kwandikhuthaza ukuba ndihlanganise into ebangel’ umdla awayenokuyixabisa ngokukhethekileyo uPaul.Ewe, abafundi abaninzi beli nqaku lophando banomdla kwindawo uPawulos afake isandla kuyo, eyile interface thermodynamics,” utshilo uGliksman.
Omnye ugxa wakhe owaphefumlela uGliksman ukuba abhale eli nqaku yayinguSemyon Koksal, unjingalwazi wezibalo, intloko yesebe nosekela mongameli wemicimbi yezemfundo eFlorida Institute of Technology, owasweleka ngoMatshi 2020. UGliksman umchaze njengomntu onobubele, okrelekrele nowayeyolisa. ukuthetha naye, ephawula ukuba wamnceda wasebenzisa ulwazi lwakhe lwemathematika kuphando lwakhe.
“Mna naye sasingabahlobo abasenyongweni yaye ewuthanda kakhulu umsebenzi wam.USemyon wandinceda xa ndandiyila ii-equations ezahlukeneyo ukuchaza ukuhamba kobushushu obubangelwa kukugoba,” utshilo uGliksman.“Sichithe ixesha elininzi sixoxa ngee-equations zam nendlela yokuyiqulunqa, imida yazo, njl.njl. Yayinguye kuphela umntu endathetha naye kwaye wayeluncedo kakhulu ekuyileni ithiyori yemathematika nokundinceda ndiyilungise.”
Ulwazi oluthe vetshe: UMartin E. Gliksman et al., I-Surface Laplacian ye-interfacial thermochemical potential: indima yayo ekubunjweni kwe-slid-liquid mode, npj Microgravity (2021).I-DOI: 10.1038/s41526-021-00168-2
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