Viscosity ea mokelikeli ke tekanyo ea eona ho hanyetsa ho phalla.
Ke thepa ea mokelikeli e etsang qeto ea hore na ho hlokahala matla a makae ho o tsamaisa. Ha viscosity e phahame, ho hlokahala matla a mangata ho tsamaisa mokelikeli.
The viscosity ea mokelikeli angoa ke mocheso oa eona. Ha mokelikeli o futhumala, o theola viscosity ea oona. Ha mokelikeli o bata haholo, ponahalo ea oona ea viscosity e phahame.
Viscosity ea lero le eona e angoa ke khatello ea eona. Ha khatello e phahame, ke moo mokelikeli o nang le viscosity e phahameng.
Viscosity ea mokelikeli e ka lekanyetsoa ka viscometer. Viscometer ke sesebelisoa se lekanyang ho hanyetsa ha mokelikeli ho phalla. Viscosity ea mokelikeli ke thepa ea bohlokoa lits'ebetsong tse ngata. Ka mohlala, viscosity ea mokelikeli e ka sebelisoa ho fumana hore na matla a mangata a hlokahalang ho e tsamaisa ka phala.
Viscosity ho fisiks ke e 'ngoe ea litšobotsi tsa lintho tseo ho tsona ho sisinyeha ha limolek'hule mabapi le limolek'hule tse potolohileng li kopanang, ka lebaka la matla a intermolecular, matla a hanyetsanang: ho solids e phahameng ka ho fetisisa, empa e tlaase ka ho fetisisa ka metsi le likhase. Haeba re qoelisa 'mele osele ka har'a mokelikeli o ntseng o nahanoa, o tla kopana le khanyetso eo matla a eona a fapaneng ho latela tekanyo ea mokelikeli oa viscosity.
Ka mohlala, li-molasses li na le viscosity e phahameng ho feta metsi hobane ha e khone ho phalla.
Ho na le mekhoa e mengata eo motho a ka e sebelisang ho metha viscosity ea mokelikeli, mokhoa o bonolo le o hlakileng ka ho fetisisa ke oa ho akhela selikalikoe sa bophara bo itseng ka har’a sejalo se bonaletsang se nang le mokelikeli oo motho a lekang ho o tseba ka viscosity.
TLHOKOMELISO: ho fetoha ha viscosity ho bitsoa fluidity, tekanyo ea boreleli.
Viscosity ke ntlha ea bohlokoa ho khethollang matla a lokelang ho hlola ha metsi a sebelisoa bakeng sa ho tlotsa le ho tsamaisoa ka liphaephe. Ka hona ho tla ba bohlokoa ho rona hore re ka tlasestand mokelikeli oa mofuta ofe Besa® valve e tla sebetsa le eona, kaha khohlano pakeng tsa marako a phala le mokelikeli o phallang ho eona o ama ts'ebetso ea ho tsoa ha valve.
E laola ho phalla ha mokelikeli ka hare processtse kang ho fafatsa, ho bopa ka ente le ho roala holim'a metsi.
Viscosity e matla
A re hlahlobeng lifofane tse peli, tse arotsoeng ke mokelikeli (mocheso o laoloang) le tse bapileng le each e 'ngoe, e 'ngoe e eme' me e 'ngoe e tlas'a matla a e sutumetsang/e hulang ho bapa le sefofane se seng.
Ho itšetlehile ka mokelikeli oo re o sebelisang ho arola lifofane tse peli, 'me kamehla re sebelisa matla a tšoanang ho tsamaisa se seng sa lifofane tse peli, re tla fumana hore lebelo la sefofane le fapana ho itšetlehile ka mokelikeli oo re o khethileng.
Ka kakaretso re na le:
A (m^2)= sebaka sa lifofane tse bapileng
y (m)= sebaka se pakeng tsa difofane tse pedi
F (N)= matla a sebedisoang sefofaneng se tsamayang
u (m/s^2)= lebelo la sefofane se tsamayang
τ = matla a tangential
Matla a tangential a tla lekana ka tsela e fapaneng le sebaka se pakeng tsa lifofane tse peli le ho lekana ka ho toba le lebelo.
Ho hlahisa lentsoe la lebelo ho thatafatsa lintho, hobane feela ka khopolo ke phapang ea lebelo la mola.
Liyuniti tsa tekanyo
Tsamaisong ea machaba viscosity e lekanngoa ka pascals (Pa s) e lekanang le poiseuille (PI), ka linako tse ling bakeng sa oli ea ho tlotsa tsamaiso ea CGS e boetse e sebelisoa, ke hore centipoise (cP)
1 Pa s = 1 PI
1 cP = 1 mPI
Kinematic Viscosity: 1 cSt (centiStokes) = 10-6 m2/s
| Metsi | Mocheso (ºF) | Mocheso (ºC) | Viscosity ea Kinematic CentiStokes (cSt) | Viscosity ea Kinematic Metsotsoana ea Saybolt Universal (SSU) |
|---|---|---|---|---|
| Acetaldehyde CH3CHO | 61 | 16.1 | 0.305 | 36 |
| Acetaldehyde CH3CHO | 68 | 20 | 0.295 | |
| Acetic acid - asene - 10% CH3COOH | 59 | 15 | 1.35 | 31.7 |
| Acetic acid - 50% | 59 | 15 | 2.27 | 33 |
| Acetic acid - 80% | 59 | 15 | 2.85 | 35 |
| Acetic acid - leqhoa le nang le leqhoa | 59 | 15 | 1.34 | 31.7 |
| Acetic acid anhydride (CH3COO)2O | 59 | 15 | 0.88 | |
| Acetone CH3COCH3 | 68 | 20 | 0.41 | |
| Joala - allyl | 68 | 20 | 1.60 | 31.8 |
| Joala - allyl | 104 | 40 | 0.90 maq | |
| Joala - butyl-n | 68 | 20 | 3.64 | 38 |
| Joala - ethyl (lithollo) C2H5OH | 68 | 20 | 1.52 | 31.7 |
| Joala - ethyl (lithollo) C2H5OH | 100 | 37.8 | 1.2 | 31.5 |
| Joala - methyl (lehong) CH3OH | 59 | 15 | 0.74 | |
| Joala - methyl (lehong) CH3OH | 32 | 0 | 1.04 | |
| Joala - propyl | 68 | 20 | 2.8 | 35 |
| Joala - propyl | 122 | 50 | 1.4 | 31.7 |
| Aluminium sulfate - 36% tharollo | 68 | 20 | 1.41 | 31.7 |
| Ammonia | 0 | -17.8 | 0.30 | |
| aniline | 68 | 20 | 4.37 | 40 |
| aniline | 50 | 10 | 6.4 | 46.4 |
| Asphalt RC-0, MC-0, SC-0 | 77 | 25 | 159-324 | 737-1.5M |
| Asphalt RC-0, MC-0, SC-0 | 100 | 37.8 | 60-108 | 280-500 |
| Oli ea crankcase e ikemetseng | 0 | -17.8 | 1295-max | 6M-max |
| SAE 10W | ||||
| Oli ea crankcase e ikemetseng | 0 | -17.8 | 1295-2590 | 6M-12M |
| SAE 10W | ||||
| Oli ea crankcase e ikemetseng | 0 | -17.8 | 2590-10350 | 12M-48M |
| SAE 20W | ||||
| Oli ea crankcase e ikemetseng | 210 | 98.9 | 5.7-9.6 | 45-58 |
| SA 20 | ||||
| Oli ea crankcase e ikemetseng | 210 | 98.9 | 9.6-12.9 | 58-70 |
| SA 30 | ||||
| Oli ea crankcase e ikemetseng | 210 | 98.9 | 12.9-16.8 | 70-85 |
| SA 40 | ||||
| Oli ea crankcase e ikemetseng | 210 | 98.9 | 16.8-22.7 | 85-110 |
| SA 50 | ||||
| Oli ea likoloi tsa likoloi | 210 | 98.9 | 4.2 mets | 40 mets |
| SAE 75W | ||||
| Oli ea likoloi tsa likoloi | 210 | 98.9 | 7.0 mets | 49 mets |
| SAE 80W | ||||
| Oli ea likoloi tsa likoloi | 210 | 98.9 | 11.0 mets | 63 mets |
| SAE 85W | ||||
| Oli ea likoloi tsa likoloi | 210 | 98.9 | 14-25 | 74-120 |
| SAE 90W | ||||
| Oli ea likoloi tsa likoloi | 210 | 98.9 | 25-43 | 120-200 |
| SA 140 | ||||
| Oli ea likoloi tsa likoloi | 210 | 98.9 | 43 - mets | 200 mets |
| EA-150-SA | ||||
| Biri | 68 | 20 | 1.8 | 32 |
| Benzene (Benzol) C6H6 | 32 | 0 | 1.0 | 31 |
| Benzene (Benzol) C6H6 | 68 | 20 | 0.74 | |
| Oli ea masapo | 130 | 54.4 | 47.5 | 220 |
| Oli ea masapo | 212 | 100 | 11.6 | 65 |
| Bromine | 68 | 20 | 0.34 | |
| Butane-n | -50 | -1.1 | 0.52 | |
| Butane-n | 30 | 0.35 | ||
| Butyric acid n | 68 | 20 | 1.61 | 31.6 |
| Butyric acid n | 32 | 0 | 2.3 maq | |
| Calcium chloride 5% | 65 | 18.3 | 1156 | |
| Calcium chloride 25% | 60 | 15.6 | 4.0 | 39 |
| Carbolic acid (phenol) | 65 | 18.3 | 11.83 | 65 |
| Carbolic acid (phenol) | 194 | 90 | 1.26 maq | |
| Carbon tetrachloride CCl4 | 68 | 20 | 0.612 | |
| Carbon tetrachloride CCl4 | 100 | 37.8 | 0.53 | |
| Carbon disulfide CS2 | 32 | 0 | 0.33 | |
| Carbon disulfide CS2 | 68 | 20 | 0.298 | |
| Oli ea Castor | 100 | 37.8 | 259-325 | 1200-1500 |
| Oli ea Castor | 130 | 54.4 | 98-130 | 450-600 |
| Oli ea lehong ea China | 69 | 20.6 | 308.5 | 1425 |
| Oli ea lehong ea China | 100 | 37.8 | 125.5 | 580 |
| Chloroform | 68 | 20 | 0.38 | |
| Chloroform | 140 | 60 | 0.35 | |
| Oli ea kokonate | 100 | 37.8 | 29.8-31.6 | 140-148 |
| Oli ea kokonate | 130 | 54.4 | 14.7-15.7 | 76-80 |
| Oli ea Cod (oli ea tlhapi) | 100 | 37.8 | 32.1 | 150 |
| Oli ea Cod (oli ea tlhapi) | 130 | 54.4 | 19.4 | 95 |
| Oli ea poone | 130 | 54.4 | 28.7 | 135 |
| Oli ea poone | 212 | 100 | 8.6 | 54 |
| Tharollo ea starch ea poone | 70 | 21.1 | 32.1 | 150 |
| 22 Baume | 100 | 37.8 | 27.5 | 130 |
| Tharollo ea starch ea poone | 70 | 21.1 | 129.8 | 600 |
| 24 Baume | 100 | 37.8 | 95.2 | 440 |
| Tharollo ea starch ea poone | 70 | 21.1 | 303 | 1400 |
| 25 Baume | 100 | 37.8 | 173.2 | 800 |
| Oli ea peo ea k'hothone | 100 | 37.8 | 37.9 | 176 |
| Oli ea peo ea k'hothone | 130 | 54.4 | 20.6 | 100 |
| Oli e sa tsoakoang - 48º API | 60 | 15.6 | 3.8 | 39 |
| Oli e sa tsoakoang - 48º API | 130 | 54.4 | 1.6 | 31.8 |
| Oli e sa tsoakoang - 40º API | 60 | 15.6 | 9.7 | 55.7 |
| Oli e sa tsoakoang - 40º API | 130 | 54.4 | 3.5 | 38 |
| Oli e sa tsoakoang - 35.6º API | 60 | 15.6 | 17.8 | 88.4 |
| Oli e sa tsoakoang - 35.6º API | 130 | 54.4 | 4.9 | 42.3 |
| Oli e sa tsoakoang - 32.6º API | 60 | 15.6 | 23.2 | 110 |
| Oli e sa tsoakoang - 32.6º API | 130 | 54.4 | 7.1 | 46.8 |
| Decane-n | 0 | 17.8 | 2.36 | 34 |
| Decane-n | 100 | 37.8 | 1001 | 31 |
| Diethyl glycol | 70 | 21.1 | 32 | 149.7 |
| Diethyl ether | 68 | 20 | 0.32 | |
| Mafura a diesel 20 | 100 | 37.8 | 44714 | 32.6-45.5 |
| Mafura a diesel 20 | 130 | 54.4 | La 1-3.97 Phato, XNUMX | -39 |
| Mafura a diesel 30 | 100 | 37.8 | 6-11.75 | 45.5-65 |
| Mafura a diesel 30 | 130 | 54.4 | 3.97-6.78 | 39-48 |
| Mafura a diesel 40 | 100 | 37.8 | 29.8 max | 140 max |
| Mafura a diesel 40 | 130 | 54.4 | 13.1 max | 70 max |
| Mafura a diesel 60 | 122 | 50 | 86.6 max | 400 max |
| Mafura a diesel 60 | 160 | 71.1 | 35.2 max | 165 max |
| Ethyl acetate CH3COOC2H3 | 59 | 15 | 0.4 | |
| Ethyl acetate CH3COOC2H3 | 68 | 20 | 0.49 | |
| Ethyl bromide C2H5Br | 68 | 20 | 0.27 | |
| Ethylene bromide | 68 | 20 | 0.787 | |
| Ethylene chloride | 68 | 20 | 0.668 | |
| Ethylene glycol | 70 | 21.1 | 17.8 | 88.4 |
| Formic acid 10% | 68 | 20 | 1.04 | 31 |
| Formic acid 50% | 68 | 20 | 1.2 | 31.5 |
| Formic acid 80% | 68 | 20 | 1.4 | 31.7 |
| Formic acid e tsepamisitsoe | 68 | 20 | 1.48 | 31.7 |
| Formic acid e tsepamisitsoe | 77 | 25 | 1.57p | |
| Freon -11 | 70 | 21.1 | 0.21 | |
| Freon -12 | 70 | 21.1 | 0.27 | |
| Freon -21 | 70 | 21.1 | 1.45 | |
| furaldehyde | 68 | 20 | 1.45 | 31.7 |
| furaldehyde | 77 | 25 | 1.49p | |
| Oli ea mafura 1 | 70 | 21.1 | 2.39-4.28 | 34-40 |
| Oli ea mafura 1 | 100 | 37.8 | -2.69 | 32-35 |
| Oli ea mafura 2 | 70 | 21.1 | 3.0-7.4 | 36-50 |
| Oli ea mafura 2 | 100 | 37.8 | 2.11-4.28 | 33-40 |
| Oli ea mafura 3 | 70 | 21.1 | 2.69-5.84 | 35-45 |
| Oli ea mafura 3 | 100 | 37.8 | 2.06-3.97 | 32.8-39 |
| Oli ea mafura 5A | 70 | 21.1 | 7.4-26.4 | 50-125 |
| Oli ea mafura 5A | 100 | 37.8 | 4.91-13.7 | 42-72 |
| Oli ea mafura 5B | 70 | 21.1 | 26.4- | 125- |
| Oli ea mafura 5B | 100 | 37.8 | 13.6-67.1 | 72-310 |
| Oli ea mafura 6 | 122 | 50 | 97.4-660 | 450-3M |
| Oli ea mafura 6 | 160 | 71.1 | 37.5-172 | 175-780 |
| Oli ea khase | 70 | 21.1 | 13.9 | 73 |
| Oli ea khase | 100 | 37.8 | 7.4 | 50 |
| Peterole a | 60 | 15.6 | 0.88 | |
| Peterole a | 100 | 37.8 | 0.71 | |
| Peterole b | 60 | 15.6 | 0.64 | |
| Peterole b | 100 | 37.8 | ||
| Peterole c | 60 | 15.6 | 0.46 | |
| Peterole c | 100 | 37.8 | 0.40 | |
| Glycerin 100% | 68.6 | 20.3 | 648 | 2950 |
| Glycerin 100% | 100 | 37.8 | 176 | 813 |
| Glycerin 50% metsi | 68 | 20 | 5.29 | 43 |
| Glycerin 50% metsi | 140 | 60 | 1.85 maq | |
| Glucose | 100 | 37.8 | 7.7M-22M | 35M-100M |
| Glucose | 150 | 65.6 | 880-2420 | 4M-11M |
| Heptanes-n | 0 | -17.8 | 0.928 | |
| Heptanes-n | 100 | 37.8 | 0.511 | |
| Hexane-n | 0 | -17.8 | 0.683 | |
| Hexane-n | 100 | 37.8 | 0.401 | |
| Mahe a linotsi | 100 | 37.8 | 73.6 | 349 |
| Enke, bahatisi | 100 | 37.8 | 550-2200 | 2500-10M |
| Enke, bahatisi | 130 | 54.4 | 238-660 | 1100-3M |
| Insulating oli | 70 | 21.1 | 24.1 max | 115 max |
| Insulating oli | 100 | 37.8 | 11.75 max | 65 max |
| parafine | 68 | 20 | 2.71 | 35 |
| Mafura a Jet | -30. | -34.4 | 7.9 | 52 |
| Nama ea fariki | 100 | 37.8 | 62.1 | 287 |
| Nama ea fariki | 130 | 54.4 | 34.3 | 160 |
| Oli ea mohloaare | 100 | 37.8 | 41-47.5 | 190-220 |
| Oli ea mohloaare | 130 | 54.4 | 23.4-27.1 | 112-128 |
| Oli e tlotsitsoeng | 100 | 37.8 | 30.5 | 143 |
| Oli e tlotsitsoeng | 130 | 54.4 | 18.94 | 93 |
| Mercury | 70 | 21.1 | 0.118 | |
| Mercury | 100 | 37.8 | 0.11 | |
| Methyl acetate | 68 | 20 | 0.44 | |
| Methyl acetate | 104 | 40 | 0.32 maq | |
| Methyl iodide | 68 | 20 | 0.213 | |
| Methyl iodide | 104 | 40 | 0.42 maq | |
| Oli ea menhaden | 100 | 37.8 | 29.8 | 140 |
| Oli ea menhaden | 130 | 54.4 | 18.2 | 90 |
| Lebese | 68 | 20 | 1.13 | 31.5 |
| Molasses A, oa pele | 100 | 37.8 | 281-5070 | 1300-23500 |
| Molasses A, oa pele | 130 | 54.4 | 151-1760 | 700-8160 |
| B, ea bobeli | 100 | 37.8 | 1410-13.2M | 6535-61180 |
| B, ea bobeli | 130 | 54.4 | 660-3.3M | 3058-15294 |
| C, lesela le letšo | 100 | 37.8 | 2630-55M | 12190-255M |
| C, lesela le letšo | 130 | 54.4 | 1320-16.5M | 6120-76.5M |
| Naphthalene | 176 | 80 | 0.9 | |
| Naphthalene | 212 | 100 | 0.78 maq | |
| Oli ea Neatstool | 100 | 37.8 | 49.7 | 230 |
| Oli ea Neatstool | 130 | 54.4 | 27.5 | 130 |
| Nitrobenzene | 68 | 20 | 1.67 | 31.8 |
| Nonane-n | 0 | -17.8 | 1728 | 32 |
| Nonane-n | 100 | 37.8 | 0.807 | |
| Octane-n | 0 | -17.8 | 1266 | 31.7 |
| Octane-n | 100 | 37.8 | 0.645 | |
| Oli ea mohloaare | 100 | 37.8 | 43.2 | 200 |
| Oli ea mohloaare | 130 | 54.4 | 24.1 | |
| Oli ea palema | 100 | 37.8 | 47.8 | |
| Oli ea palema | 130 | 54.4 | 26.4 | |
| Oli ea matokomane | 100 | 37.8 | 42 | 200 |
| Oli ea matokomane | 130 | 54.4 | 23.4 | |
| Pentane-n | 0 | 17.8 | 0.508 | |
| Pentane-n | 80 | 26.7 | 0.342 | |
| petrolatum | 130 | 54.4 | 20.5 | 100 |
| petrolatum | 160 | 71.1 | 15 | 77 |
| Petroleum ether | 60 | 15.6 | 31(feela) | 1.1 |
| Propionic acid | 32 | 0 | 1.52 maq | 31.5 |
| Propionic acid | 68 | 20 | 1.13 | |
| propylene glycol | 70 | 21.1 | 52 | 241 |
| Oli ea ho hlatsoa | 100-120 | 20.5-25 | ||
| Oli e kopantsoeng | 100 | 37.8 | 54.1 | 250 |
| Oli e kopantsoeng | 130 | 54.4 | 31 | 145 |
| Oli ea rosin | 100 | 37.8 | 324.7 | 1500 |
| Oli ea rosin | 130 | 54.4 | 129.9 | 600 |
| Rosin (lehong) | 100 | 37.8 | 216-11M | 1M-50M |
| Rosin (lehong) | 200 | 93.3 | 108-4400 | 500-20M |
| Oli ea peo ea Sesame | 100 | 37.8 | 39.6 | 184 |
| Oli ea peo ea Sesame | 130 | 54.4 | 23 | 110 |
| Sodium chloride 5% | 68 | 20 | 1097 | 31.1 |
| Sodium chloride 25% | 60 | 15.6 | 2.4 | 34 |
| Sodium hydroxide (caustic soda) 20% | 65 | 18.3 | 4.0 | 39.4 |
| Sodium hydroxide (caustic soda) 30% | 65 | 18.3 | 10.0 | 58.1 |
| Sodium hydroxide (caustic soda) 40% | 65 | 18.3 | ||
| Oli ea soya | 100 | 37.8 | 35.4 | 165 |
| Oli ea soya | 130 | 5.4 | 19.64 | 96 |
| Oli ea peo | 100 | 37.5 | 21-23 | 110 |
| Oli ea peo | 130 | 54.4 | 15.2 | 78 |
| Asiti ea sulfuric 100% | 68 | 20 | 14.56 | 76 |
| Asiti ea sulfuric 100% | 140 | 60 | 7.2 maq | |
| Asiti ea sulfuric 95% | 68 | 20 | 14.5 | 75 |
| Asiti ea sulfuric 60% | 68 | 20 | 4.4 | 41 |
| Asiti ea sulfuric 20% | 3M-8M | |||
| Asiti ea sulfuric 20% | 650-1400 | |||
| Tar, ontong ea coke | 70 | 21.1 | 600-1760 | 15M-300M |
| Tar, ontong ea coke | 100 | 37.8 | 141-308 | 2M-20M |
| Sekontiri, ntlo ea khase | 70 | 21.1 | 3300-66M | 2500 |
| Sekontiri, ntlo ea khase | 100 | 37.8 | 440-4400 | 500 |
| Sekontiri, phaene | 100 | 37.8 | 559 | 200-300 |
| Sekontiri, phaene | 132 | 55.6 | 108.2 | 55-60 |
| Toluene | 68 | 20 | 0.68 | 185.7 |
| Toluene | 140 | 60 | 0.38 maq | |
| Triethylene glycol | 70 | 21.1 | 40 | 400-440 |
| Triethylene glycol | 185-205 | |||
| Turpentine | 100 | 37.8 | 86.5-95.2 | 1425 |
| Turpentine | 130 | 54.4 | 39.9-44.3 | 650 |
| Varnish, spar | 68 | 20 | 313 | |
| Varnish, spar | 100 | 37.8 | 143 | |
| Metsi, a silafalitsoe | 68 | 20 | 10038 | 31 |
| Metsi, a hloekileng | 60 | 15.6 | 1.13 | 31.5 |
| Metsi, a hloekileng | 130 | 54.4 | 0.55 | |
| Metsi, leoatle | 1.15 | 31.5 | ||
| Oli ea leruarua | 100 | 37.8 | 35-39.6 | 163-184 |
| Oli ea leruarua | 130 | 54.4 | 19.9-23.4 | 97-112 |
| Xylene-o | 68 | 20 | 0.93 | |
| Xylene-o | 104 | 40 | 0.623 maq |
