Mtundu wa downflow umatanthawuza kuti kayendetsedwe ka kayendedwe ka mpweya wotentha ndi wofanana ndi wazinthu, zonse zikuyenda kuchokera kumapeto kwa chakudya mpaka kumapeto. Zinthu zikangolowa mu ng'oma, mphamvu yowumitsa yowumitsa ndiyo yaikulu kwambiri ndipo madzi aulere amakhala ochuluka. Liwiro lowumitsa la gawo lakutsogolo la mtundu wothamanga ndilothamanga kwambiri, ndiyeno pamene zinthuzo zikupita ku doko lotayira, kutentha kwa zinthu kumawonjezeka, mphamvu yowumitsa yowumitsa imakhala yaying'ono, chinyezi chaulere chimachepa, ndipo liwiro la kuyanika. komanso amachepetsa. Choncho, kuyanika kwa ng'oma yowumitsa pansi kumakhala kosagwirizana kwambiri kuposa mtundu wa counter-flow.

Mtundu wotsutsa-wothamanga ndikuti kayendedwe ka kayendedwe ka mpweya wotentha ndi kosiyana ndi kayendetsedwe ka zinthu, ndipo kutentha kwa ng'oma ndikokwera kwambiri kumapeto kwa zinthu, ndipo kutentha kumakhala kotsika kumapeto kwa zinthu zolowera. . Kutentha kwa zinthuzo kumakhala kotsika kwambiri pamene kumalowa koyamba mu ng'oma, ndipo kutentha kumakhala kokwera kwambiri pamapeto otuluka, komwe kumakhala kofanana ndi kutentha kwapamwamba ndi kutsika kwa ng'oma. Chifukwa kutentha kwapamwamba kwambiri kwa ng'oma kumakhala kumbali yofanana ndi kutentha kwapamwamba kwambiri kwa zinthuzo, ndipo kutentha kochepa kwambiri kwa ng'oma kumakhala kumbali yofanana ndi kutentha kwapang'onopang'ono kwa zinthuzo, kotero kuti mphamvu yoyendetsa kuyanika kotsutsana ndi yofanana kwambiri. kuposa kuyanika kwa mtsinje.

Kawirikawiri, kutentha kwa ng'oma kumachitika makamaka ndi kutentha kwa convection. Mtundu wotsikira pansi umatanthawuza kuti chipinda choyaka moto ndi cholowera cha chakudya chimayikidwa mbali imodzi, ndipo kayendedwe ka kayendedwe ka mpweya wotentha ndi kofanana ndi kwa zinthuzo. Apo ayi, ndi mtundu wotsutsa-kuthamanga.

Pamene ng'oma yotsutsa-yothamanga ikuyanika ndi kutentha, mkati mwa ng'oma yowumitsa imatha kugawidwa m'madera atatu malinga ndi kusintha kwa kutentha kwa zinthu: malo ochepetsetsa, kuyanika ndi malo otentha. Chifukwa chakuti zinthuzo zimakhala ndi chinyezi zikamalowa mu ng'oma, chinyezi chomwe chili muzinthuzo chimachotsedwa m'dera loyamba, chophatikiziracho chidzawumitsidwa m'chigawo chachiwiri, ndipo ng'oma idzakhala yotentha kwambiri m'chigawo chachitatu. zouma zakuthupi kukweza kutentha. Nthawi zambiri, monga kutentha kwa zinthu kumawonjezeka mu ng'oma yotsutsa-panopa, kuyanika sing'anga kumawonjezekanso, kotero mphamvu yowumitsa imakhala yofanana, kusiyana kwa kutentha pakati pa kutuluka kwa mpweya wotentha ndi zinthuzo ndi zazikulu, ndi mphamvu ya kuyanika kotsutsa-panopa kumakhala kosalala. kuyenda kwambiri.

Pachomera chosakaniza phula la drum, ng'oma ili ndi ntchito ziwiri, kuyanika ndi kusakaniza; pamene pamtanda phula kusakaniza chomerandimosalekeza phula kusakaniza chomera, ng’oma imangogwira ntchito yotenthetsa. Chifukwa kusanganikirana mumtanda ndi phula kosalekeza kusakaniza zomera kumachitika kudzera mumphika wosakaniza, palibe chifukwa chowonjezera asphalt ku ng'oma yosakaniza, kotero ng'oma yowumitsa yowonongeka ndi kuyanika kwakukulu kumagwiritsidwa ntchito.