Tus Cuam Tshuam Sib xyaw
Axial thiab Radial Flow: Ob txoj kev sib tw sib txuas ntawm lub ntxaib - cov ncej tov kiv sib hloov hauv cov lus qhia rov qab. Raws li lawv tig, cov sib xyaw tuaj yeem txuas rau lub shafts yuam cov ntaub ntawv los txav mus rau hauv ob qho tib si ntawm tus ncej ntawm phab ntsa sab nraud ntawm phab ntsa sab nraud) cov lus qhia. Piv txwv li, cov hniav txhaws thawb cov ntaub ntawv los ntawm ib qho kawg ntawm tus ncej mus rau lwm qhov, tsim ib qho kev ntws axial. Nyob rau tib lub sijhawm, lawv kuj ua kom cov ntaub ntawv sab hauv ntawm phab ntsa sab hauv ntawm lub nruas sib tov, tsim kom muaj radial ntws. Qhov kev sib xyaw ua ke ntawm axial thiab radial convective cov nplaim taws ua rau loj - qhov kev cuam tshuam ntawm cov khoom sib txawv, uas yog ib feem ntawm cov txheej txheem sib xyaw tag nrho.
Volume - Raws Li Sib xyaw: Los ntawm no convective txav, sib txawv tagnrho ntawm cov ntaub ntawv yog sib hloov tsis tu ncua. Piv txwv li, hauv ib pob zeb ntawm pob zeb sib xyaw, cov cement, thiab sib xyaw ua ke ntawm txhua qhov sib xyaw ua ke, txhawb nqa cov homogeneous ntau dua.
Shear Sib xyaw
Siab - Kev Siv Shearing Force: Tus qauv tsim ntawm cov sib xyaw ua ke ntawm cov ntxaib Shafts tsim lub zog shearing quab yuam. Cov hniav yog feem ntau tau npaj rau hauv txoj kev uas yog cov ntaub ntawv tig, cov ntaub ntawv dhau ntawm cov hniav uas nyob ib sab ntawm lub phab ntsa uas nyob ntawm phab ntsa ntawm cov chav sib tov tau ua rau shearing. Qhov no yog tshwj xeeb tshwj xeeb hauv kev rhuav tshem agglomerates. Piv txwv li, hauv kev sib xyaw nrog cov hmoov nplej nrog qee cov koog ntoo, lub zog shearing tuaj yeem tsoo cov koog pob zeb rau hauv cov khoom me me, kom muaj kev sib xyaw kom zoo dua.
Particle - nplai sib xyaw: Shear sib xyaw ua ke nyob rau theem particle. Nws cov rog hais ntawm cov khoom sib txawv ntawm cov ntaub ntawv sib txawv dhau ib leeg, uas yuav pab faib kom faib cov khoom zoo kom zoo nkauj thiab cov khoom siv. Hauv kev tsim cov txheej txheem tshwj xeeb, qhov twg cov xim me me lossis cov tshuaj ntxiv yuav tsum tau sib xyaw ua ke ntawm cov ntxaib - ncej tov khoom ua si lub luag haujlwm tseem ceeb.
Diffusive sib xyaw
Random particle particle: Raws li cov ntaub ntawv yog tsis tu ncua los ntawm convective los ntawm convective los ntawm convective thiab shear kev ua, cov lus tau pib txav mus los. Qhov kev txav mus los random ua rau kev sib xyaw sib xyaw ua ke, qhov twg cov khoom sib xyaw maj mam kis tawm thiab sib txuas nrog txhua lwm yam ntawm lub microscopic nplai. Sij hawm dhau mus, cov txheej txheem diffusive ntxiv ntxiv cov sib tov, txo qhov tsis yog - kev sib txuam ntawm qib particle.
Ua tiav homogeneity: Kev sib xyaw ua ke sib xyaw pab kom ua tiav qib siab ntawm homogeneity nyob rau hauv kev sib xyaw ua zaum kawg. Txawm hais tias tom qab loj - cov kev sib xyaw ua ke tau tshwm sim, kev sib xyaw ua kom sib xyaw ua ke uas muaj cov khoom lag luam zoo nkauj me me. Piv txwv li, hauv kev tsim cov siab - precision cov ntaub ntawv sib xyaw ua ke, sib xyaw ua ke yog qhov tseem ceeb ua kom ntseeg tau tias muaj cov tshuaj atomic thiab cov roj molecular nyob hauv cov hmoov sib xyaw.