热扩散率

在传热分析中，热扩散率（符号： α {\displaystyle \alpha \,} ，但注意 κ {\displaystyle \kappa } 、 D {\displaystyle D} 和 k {\displaystyle k} 都很常用）是热导率与容积热容之比。 α = k ρ c p {\displaystyle \alpha ={k \over {\rho c_{p}}}} 其中： k {\displaystyle k\,} ：热导率（单位：W/(m K)） ρ c p {\displaystyle \rho c_{p}\,} ：容积热容（单位：J/(m3K)） ρ {\displaystyle \rho \,} ：密度（单位：kg/(m3)） c p {\displaystyle c_{p}\,} ：比热容（单位：J/(kg K)） 热扩散率的单位是m2/s。 对于普通的岩石来说， α {\displaystyle \alpha \,} ~ 10-6 m2/s。在300K，空气的热扩散率是0.000024 m2/s。 对于空气的热扩散率与绝对温度之间的关系，参见[1]。 热扩散 热容 比热容 热传导方程式 热导率 Brown; Marco. Introduction to Heat Transfer 3rd. McGraw-Hill. 1958.  and Eckert; Drake. Heat and Mass Transfer. McGraw-Hill. 1959. ISBN 978-0-89116-553-8.  cited in Holman, J.P. Heat Transfer 9th. McGraw-Hill. 2002. ISBN 978-0-07-029639-8.  V. Casalegno; P. Vavassori; M. Valle; M. Ferraris; M. Salvo; G. Pintsuk. Measurement of thermal properties of a ceramic/metal joint by laser flash method. Journal of Nuclear Materials. 2010, 407 (2): 83. Bibcode:2010JNuM..407...83C. doi:10.1016/j.jnucmat.2010.09.032.  Lide, David R. (编). CDC Handbook of Chemistry and Physics 71st. Boston: Chemical Rubber Publishing Company. 1992.  cited in Baierlein, Ralph. Thermal Physics. Cambridge, UK: Cambridge University Press. 1999: 372 [1 December 2011]. ISBN 978-0-521-59082-2.  含有內容需登入查看的頁面 (link) Jim Wilson. Materials Data. August 2007 [2021-11-07]. （原始内容存档于2021-11-08）.  P. Hofer; E. Kaschnitz. Thermal diffusivity of the aluminium alloy Al-10Si-Mn-Mg (Silafont 36) in the solid and liquid states. High Temperatures – High Pressures. 2011, 40 (3–4): 311 [2021-11-07]. （原始内容存档于2016-03-04）.  A. Lindemann; J. Blumm. Measurement of the Thermophysical Properties of Pure Molybdenum. 17th Plansee Seminar 3. 2009.  E. Kaschnitz; M. Küblböck. Thermal diffusivity of the aluminium alloy Al-5Mg-2Si-Mn (Magsimal-59) in the solid and liquid states. High Temperatures – High Pressures. 2008, 37 (3): 221 [2021-11-07]. （原始内容存档于2016-03-04）.  Lienhard, John H. Lienhard, John H. A Heat Transfer Textbook 5th. Dover Pub. 2019: 715.  O. Koszor; A. Lindemann; F. Davin; C. Balázsi. Observation of thermophysical and tribological properties of CNT reinforced Si3 N4. Key Engineering Materials. 2009, 409: 354. S2CID 136957396. doi:10.4028/www.scientific.net/KEM.409.354.  J. Blumm; A. Lindemann; B. Niedrig; R. Campbell. Measurement of Selected Thermophysical Properties of the NPL Certified Reference Material Stainless Steel 310. International Journal of Thermophysics. 2007, 28 (2): 674. Bibcode:2007IJT....28..674B. S2CID 120628607. doi:10.1007/s10765-007-0177-z.  J. Blumm; A. Lindemann; B. Niedrig. Measurement of the thermophysical properties of an NPL thermal conductivity standard Inconel 600. High Temperatures – High Pressures. 2003–2007, 35/36 (6): 621 [2021-11-07]. doi:10.1068/htjr145. （原始内容存档于2015-09-24）.  J. Blumm; A. Lindemann. Characterization of the thermophysical properties of molten polymers and liquids using the flash technique. High Temperatures – High Pressures. 2003–2007, 35/36 (6): 627. doi:10.1068/htjr144.  J. Blumm; A. Lindemann; M. Meyer; C. Strasser. Characterization of PTFE Using Advanced Thermal Analysis Technique. International Journal of Thermophysics. 2011, 40 (3–4): 311. Bibcode:2010IJT....31.1919B. S2CID 122020437. doi:10.1007/s10765-008-0512-z.  引用错误：没有为名为AJP的参考文献提供内容