labarai

Zaren da ke hana ruwa shigaa cikin nau'in canja wurin zafi za a iya raba shi zuwa abubuwa da yawa, canja wurin zafi na radiation na silo mai rami, iskar da ke cikin watsa zafi na silo mai rami da kuma watsa zafi na zaren mai ƙarfi, inda aka yi watsi da canja wurin zafi na iska mai ratsa jiki. Yawan yawa da zafin jiki suna da alaƙa da juna, mafi girman zafin jiki, ƙarancin yawan yawa na akwati, rabon canja wurin zafi na radiation yana ƙaruwa. Ga samfuran zare masu tsauri, yawan yawa yawanci yana ƙasa da 0.25g/cm', porosity yana sama da 90%, ana iya ganin matakin iskar gas a matsayin mai ci gaba, ana iya ganin matakin ƙarfi a matsayin mara ci gaba, don haka watsa zafi mai ƙarfi na zaren yana da ƙanƙanta.
Idan kawai daga ka'idar cewa yawan girman abu ƙarami ne, yawan zafin yana da girma, yawan girman abu babban ƙarfin zafin yana da ƙarami; wannan kuma bai dace da ainihin yanayin ba, kamar yadda abun ciki na ƙwallon slag ya bambanta, koda kuwa yawan girman abu iri ɗaya ne, adadin zare a kowace girman abu ya bambanta, don haka porosity a kowace girman abu ba iri ɗaya ba ne, don haka za a sami bambanci a cikin ƙarfin zafin. Duk da haka, za a iya taƙaita ƙarshen inganci kamar haka.
1. Tsarin wutar lantarki nazaruruwa masu tsaurin kaiyana raguwa da ƙaruwar yawan abu, kuma raguwar tana raguwa a hankali, amma idan yawan abu ya kai wani matsayi, ƙarfin wutar lantarki ba ya raguwa kuma yana da halin ƙaruwa a hankali.
2. A yanayin zafi daban-daban, akwai ƙaramin ƙarfin lantarki na thermal da kuma ƙaramin ƙarfin lantarki mai dacewa. Yawan da ya dace da ƙaramin ƙarfin lantarki na thermal yana ƙaruwa tare da ƙaruwar zafin jiki.
3. Don irin wannan yawan, ƙarfin zafin ya bambanta da girman ramuka.
(1) Girman ramin 0.1mm.
0C zuwa = 0.0244W/(m. K) 100C lokacin da λ = 0.0314W / (m. K)
(2) Buɗewar rami 2mm.
A cikin 0C = 0.0314W/(m, K) λ = 0.0512W/(m. K) a 100C. K)
Diamita na ramin 1mm, zafin jiki yana tashi daga 0C zuwa 500C, ƙimar ƙarfin zafinsa yana ƙaruwa sau 5.3; diamita na ramin 5mm, zafin jiki yana tashi daga 0C zuwa 500C, ƙimar ƙarfin zafinsa yana ƙaruwa sau 11.7. Saboda haka, girman ramukan da ke cikin zare mai hana ruwa gudu, haka nan yawan girman da ya dace da shi, kuma ƙarfin ƙarfin zafin yana ƙaruwa.