Video: Dab tsi yog stability ntawm kev ncua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
STABILITY NTAWM SUSPENSION . Nws yog ib qho tseem ceeb kom nkag siab qhov ntawd kev ncua yog kinetically ruaj khov , tab sis thermodynamically tsis ruaj khov, system. Lub cev ruaj khov yog txhais raws li tus mob nyob rau hauv uas cov hais nyob rau hauv uniformly faib thoob plaws hauv lub dispersion tsis muaj tej yam tshwm sim ntawm sedimentation.
Ntawm no, vim li cas qhov kev ncua yog ruaj khov dua li kev daws teeb meem?
Vim yog lawv tus cwj pwm ua kua, kev ncua sawv cev rau daim foos zoo tagnrho rau cov neeg mob uas muaj teeb meem nqos cov ntsiav tshuaj lossis tshuaj ntsiav. Thaum kawg, tshuaj nyob rau hauv kev ncua yog tshuaj ruaj khov dua hauv daws.
Ib sab saum toj no, kuv yuav ua li cas thiaj li txwv tsis pub kuv qhov kev ncua tsis pub dhau? Caking tej zaum tiv thaiv los ntawm kev tsim kev ncua nrog cov txheej txheem sib koom ua ke uas txhawb nqa cov khoom thiab ua kom lawv tsis txhob nkag mus rau ib qho chaw kaw. Lub network tej zaum yuav muaj tus neeg sawv cev ncua (cov qauv tsheb), cov khoom lawv tus kheej (flocculated), los yog kev sib xyaw ntawm ob.
Qhov thib ob, vim li cas cov kev ncua tsis ruaj khov?
Tag nrho kev ncua , suav nrog ntxhib emulsions, yog qhov tseeb ntawm thermodynamically tsis ruaj khov . Lawv yuav, los ntawm random motion ntawm cov hais thaum lub sij hawm, aggreg vim ntawm lub ntuj thiab tseem ceeb nyiam kom txo tau qhov loj tshwj xeeb deg cheeb tsam thiab tshaj nto zog.
Pharmaceutical suspension yog dab tsi?
A tshuaj raug ncua yog ib coarse dispersion ntawm insoluble khoom hais nyob rau hauv ib tug kua nruab nrab. Txawm li cas los xij, nws yog qhov nyuaj thiab tseem ua tsis tau zoo los ua kom muaj kev ciam teb ntawm kev sib tw kev ncua thiab cov dispersions muaj cov khoom zoo dua. Kev ncua yog ib hoob tseem ceeb ntawm tshuaj noj cov ntawv.
Pom zoo:
Dab tsi yog lub tswv yim ntawm kev txhawb nqa ntawm kev sib cais ntawm kev sib deev?
Kev txhawb zog yog cov txheej txheem los ntawm kev xaiv ntuj tsim kom muaj kev sib cais ntawm kev sib deev. Kev txhawb zog tuaj yeem tshwm sim raws li hauv qab no: Thaum ob pawg neeg uas tau khaws cia sib nrug, rov qab los rau hauv kev sib cuag, qhov kev sib cais ntawm cov menyuam yaus yuav ua tiav lossis tsis tiav. Yog tias nws ua tiav, speciation tau tshwm sim
Dab tsi yog qhov txawv ntawm kev tswj thiab qhov tsis tu ncua hauv kev tshawb fawb?
Qhov sib txawv ntawm qhov tsis tu ncua thiab Tswj Ib qhov hloov pauv tsis tu ncua tsis hloov. Ib qho kev tswj hwm qhov sib txawv ntawm lwm qhov kev hloov pauv, tab sis txhob txwm ua kom tas mus li thoob plaws qhov kev sim kom qhia txog kev sib raug zoo ntawm kev vam thiab kev ywj pheej
Qhov kev ncua deb ntawm ib lub voj voog dhau ntawm nws qhov chaw yog dab tsi?
Qhov kev ncua deb hla ib lub voj voog los ntawm qhov chaw yog hu ua txoj kab uas hla. Ib qho piv txwv tiag tiag ntawm txoj kab uas hla yog 9-nti phaj. Lub vojvoog ntawm lub voj voog yog qhov kev ncua deb ntawm qhov nruab nrab ntawm lub voj voog mus rau ib qho chaw ntawm lub voj voog
Dab tsi yog qhov kev ncua deb ntawm qhov sib law liag ntawm compression thiab ntawm rarefaction?
Qhov kev ncua deb ntawm ob sib law liag compressions los yog rarefactions nyob rau hauv ib nthwv dej yog hu ua wavelength
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua