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 kwembule 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 komcamelo womoya, kuvimbela ibhalansi yokucindezela komoya okwehlayo ukuya ku-pressure edonsayo i-gradient.Ngokuphambene nalokho, i-glycerin cishe ayinakho ukugeleza kwangaphakathi okuzwakalayo, okuvimbela ukungena kwayo ku-coating.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.