Enkosi ngokubhalisela iPhysical World Ukuba ungathanda ukutshintsha iinkcukacha zakho nangaliphi na ixesha, nceda undwendwele iakhawunti yam
Ubusi kunye nolunye ulwelo olubonakalayo luhamba ngokukhawuleza kunamanzi kwiicapillaries ezigqunywe ngokukhethekileyo.Ukufunyaniswa okumangalisayo kwenziwa nguMaja Vuckovac kunye noogxa kwiYunivesithi yaseAalto eFinland, owabonisa kwakhona ukuba le mpembelelo ye-counterintuitive ibangelwa ukucuthwa kokuhamba kwangaphakathi ngaphakathi kwe-droplets.
Intsimi ye-microfluidics ibandakanya ukulawula ukuhamba kolwelo ngokusebenzisa imimandla evaliweyo ye-capillaries-ngokuqhelekileyo ukwenzela ukuveliswa kwezixhobo zezicelo zonyango.I-viscosity fluids ephantsi ilungele i-microfluidics kuba ihamba ngokukhawuleza kwaye ingenamsebenzi.I-viscous engaphezulu yamanzi ingasetyenziswa ngokuyiqhuba kwiingcinezelo eziphezulu, kodwa oku kwandisa uxinzelelo lomatshini kwi-delicate structure can lead delicate.
Ngaphandle koko, ukuhamba kunokukhawuleziswa ngokusebenzisa i-superhydrophobic coating equkethe i-micro- kunye ne-nanostructures ebamba ii-cushions zomoya.Ezi zixhobo zinciphisa kakhulu indawo yokudibanisa phakathi kwe-liquid kunye ne-surface, nto leyo iyanciphisa ukungqubuzana - ukunyuka kokunyuka kwe-65%.
Iqela likaVuckovac livavanye le thiyori ngokujonga amathontsi ee-viscosity ezahlukeneyo njengoko umxhuzulane wabatsalela kwi-capillaries ethe nkqo kunye ne-superhydrophobic yangaphakathi coatings.Njengoko behamba ngesantya esingaguqukiyo, amathontsi acinezela umoya ongaphantsi kwawo, esenza i-gradient yoxinzelelo enokuthelekiswa naleyo kwipiston.
Nangona amaconsi abonisa ubudlelwane obuphambeneyo obulindelekileyo phakathi kwe-viscosity kunye nesantya sokuhamba kwimibhobho evulekileyo, xa enye okanye zombini iziphelo zavalwa, imithetho yatshintshwa ngokupheleleyo.Isiphumo sasibonakaliswe kakhulu ngamaconsi e-glycerol-nangona i-3 imiyalelo yobukhulu obukhulu kunamanzi, ihamba ngaphezu kwamaxesha e-10 ngokukhawuleza kunamanzi.
Ukutyhila i-physics emva kwesi siphumo, iqela le-Vuckovac lazisa iincinci ze-tracer kwi-droplets.Intshukumo yeengqungquthela ngokuhamba kwexesha ibonise ukuhamba kwangaphakathi ngokukhawuleza ngaphakathi kwe-droplet engaphantsi kwe-viscous.Ezi zigeleza zibangela ukuba ulwelo lungene kwi-micro- kunye ne-nano-scale structures kwi-coating.Oku kunciphisa ubukhulu bombhobho womoya, ukuthintela ukuchasana kwe-pressurized emoyeni, ukunqanda i-pressurized air, ukuthintela ukuchasana kwe-pressurized emoyeni. i-glycerin iphantse ingabonakali ukuhamba kwangaphakathi, inqanda ukungena kwayo kwi-coating.Oku kuphumela kwi-cushion yomoya ebanzi, okwenza kube lula ukuba umoya ongaphantsi kwethontsi uhambe kwicala elinye.
Ukusebenzisa ukuqwalaselwa kwabo, iqela liphuhlise imodeli ehlaziyiweyo ye-hydrodynamic eqikelela ngakumbi indlela amaconsi ahamba ngayo kwii-capillaries ezineengubo ezahlukeneyo ze-superhydrophobic.
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