Mmekọrịta dị n'etiti ihe na-ekpo ọkụ nke okpomọkụ nke ihe mkpuchi bụ λ = k / (ρ × c), ebe k na-anọchite anya ihe na-eme ka ọkụ nke ihe, ρ na-anọchi anya njupụta, na c na-anọchi anya okpomọkụ dị iche iche.
1. Echiche nke thermal conductivity
N'ime ihe mkpuchi mkpuchi, conductivity thermal na-ezo aka n'ikike nke okpomọkụ n'otu mpaghara n'ime ihe na-agafe ihe ọ bụla n'otu oge, ya bụ, ọnụego ọkụ ọkụ. A na-egosipụtakarị ya site na ikpo ọkụ na-ekpo ọkụ n'otu mpaghara kwa nkeji oge mgbe ọdịiche okpomọkụ dị 1K, na unit bụ W / (m·K). Ọnụ ọgụgụ nke ikpo ọkụ ọkụ na-adabere na okpomọkụ na okpomọkụ dị iche nke ihe.
2. Usoro mgbako nke thermal conductivity
Igwe ọkụ ọkụ nke ihe mkpuchi ihe na-ejikọta ya na njupụta, kpọmkwem okpomọkụ na okpomọkụ nke ihe onwunwe, na mmekọrịta dị n'etiti ha bụ: λ = k / (ρ × c).
N'ime ha, k na-anọchite anya conductivity thermal nke ihe, unit bụ W / (m·K); ρ na-anọchi anya njupụta, unit bụ kg/m³; c na-anọchi anya okpomọkụ kpọmkwem, unit bụ J / (kg·K). Usoro a na-agwa anyị na ọ bụrụ na anyị chọrọ ibelata okpomọkụ conductivity nke ihe mkpuchi ihe, anyị kwesịrị ibelata njupụta, kpọmkwem okpomọkụ ike na thermal conductivity nke ihe.
3. Ihe ndị na-emetụta conductivity thermal
A na-emetụta ọtụtụ ihe ndị dị ka okpomọkụ, ihe nhazi nke ihe (dịka nhazi kristal), ihe mejupụtara kemịkalụ nke ihe onwunwe, mmekọrịta nke ihe, wdg. Tụkwasị na nke ahụ, njupụta, ọdịnaya mmiri, porosity na ihe ndị ọzọ nke ihe mkpuchi ahụ ga-emetụtakwa conductivity thermal.
Oge nzipu: Jan-20-2025
