Ngiyabonga ngokubhalisela i-Physical World Uma ungathanda ukushintsha imininingwane yakho noma nini, sicela uvakashele i-akhawunti yami
Uju nolunye uketshezi olune-viscous lugeleza ngokushesha kunamanzi kuma-capillaries ambozwe ngokukhethekile.Okutholakele okumangazayo kwenziwa nguMaja Vuckovac nozakwabo base-Aalto University e-Finland, abaphinde babonisa ukuthi lo mphumela ophikisayo usukela ekucindezelweni kokugeleza kwangaphakathi ngaphakathi kwamaconsi ama-viscous amaningi.
Umkhakha we-microfluidics uhilela ukulawula ukugeleza koketshezi ezindaweni ezivalwe ngokuqinile zama-capillaries—ngokuvamile okokwenziwa kwezinto zokusebenza zezokwelapha.Uketshezi lwe-viscosity oluphansi lungcono kakhulu kuma-microfluidics ngoba lugeleza ngokushesha futhi ngaphandle kokuzikhandla.Olunye uketshezi lwe-viscous lungasetshenziswa ngokulushayela emicinini emikhulu, kodwa lokhu kwandisa ukucindezeleka komshini esakhiweni esintekenteke esingaholela ekuhlulekeni kwe-capilla.
Ngaphandle kwalokho, ukugeleza kungasheshiswa ngokusebenzisa i-superhydrophobic coating equkethe i-micro- kanye ne-nanostructures ebamba ama-cushions emoyeni.Lawa ma-cushions anciphisa kakhulu indawo yokuxhumana phakathi kwe-liquid kanye ne-surface, okubuye kunciphise ukungqubuzana - ukugeleza okwandayo ngo-65%.Nokho, ngokusho kombono wamanje, lawa mazinga okugeleza aqhubeka nokuncipha ngokukhula kwe-viscosity.
Ithimba likaVuckovac lihlole le thiyori ngokubheka amaconsi ama-viscosity ahlukahlukene njengoba amandla adonsela phansi awakhipha kuma-capillaries aqondile ane-superhydrophobic inner coatings.Njengoba ehamba ngesivinini esingaguquki, amaconsi acindezela umoya ongaphansi kwawo, enza i-gradient yokucindezela efana naleyo esepiston.
Nakuba amaconsi abonisa ubuhlobo obuphambene obulindelekile phakathi kwe-viscosity kanye nesilinganiso sokugeleza kumashubhu avulekile, lapho isiphetho esisodwa noma zombili zivaliwe, imithetho yaguqulwa ngokuphelele.Umphumela wawuvezwe kakhulu ngamaconsi e-glycerol-nakuba ama-3 ama-oda obukhulu obukhulu kakhulu kunamanzi, ageleza izikhathi ezingaphezu kuka-10 ngokushesha kunamanzi.
Ukuze lembule i-physics engemuva kwalo mphumela, ithimba lika-Vuckovac lethule izinhlayiya ze-tracer kumaconsi. Ukunyakaza kwezinhlayiya ngokuhamba kwesikhathi kwembula ukugeleza kwangaphakathi okusheshayo ngaphakathi kweconsi elincane elibonakalayo. Lokhu kugeleza kubangela ukuthi uketshezi lungene ezakhiweni zesikali se-micro- kanye ne-nano-scale ku-coating.Lokhu kunciphisa ukujiya kwecashion yomoya, kuvimbela ibhalansi yomoya ocindezelayo ukuthi isuke ku-pressurized droplet. I-glycerin cishe ayinakho ukugeleza kwangaphakathi okuzwakalayo, okuvimbela ukungena kwayo embotsheni.Lokhu kubangela umcamelo womoya omkhulu, okwenza kube lula ukuthi umoya ongaphansi kwethonsi uhambe ohlangothini olulodwa.
Ngokusebenzisa ukuqaphela kwabo, ithimba lenze imodeli ebuyekeziwe ye-hydrodynamic ebikezela kangcono ukuthi amaconsi ahamba kanjani ngama-capillaries ane-coatings ehlukene ye-superhydrophobic.Ngomsebenzi oqhubekayo, okutholakele kwabo kungaholela ezindleleni ezintsha zokudala amadivaysi e-microfluidic akwazi ukuphatha amakhemikhali ayinkimbinkimbi nezidakamizwa.
I-Physics World imele ingxenye ebalulekile yenjongo ye-IOP Publishing yokuxhumana ngocwaningo olusezingeni lomhlaba kanye nokuqamba izinto ezintsha kubabukeli abaningi ngangokunokwenzeka.Le ndawo iyingxenye yephothifoliyo ye-Physics World, ehlinzeka ngeqoqo lezinsiza zolwazi oluku-inthanethi, lwedijithali kanye nokuphrinta emphakathini wesayensi womhlaba.