非稳态扩散(Nonsteady-state diffusion)的特点是：在扩散过程中，和J都随时间变化。通过各处的扩散通量J 随着距离x在变化，而稳态扩散的扩散通量则处处相等，不随距离而...
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非稳态扩散场 non-steady state diffusion field
Moisture unsteady-state diffusion of Cottonwood veneer during high temperature drying was tested and researched. The conclusions are as follows: The fiber structure is checked when the veneer is peeled, so the unsteady-state diffusion coefficient is higher than the normal lumber.
本文还研究了美洲黑杨单板在高温环境中的水分非稳态扩散的扩散系数,由于加工过程中的影响,单板的扩散系数与锯材相比,大大提高。
参考来源 - 美洲黑杨单板高温干燥模型和能耗的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
该模型不仅考虑了非稳态下膜相扩散阻力，而且还考虑了外相边界层的扩散阻力及膜破裂。
This model takes into account both the diffusion resistance of the membrane phase in non-steady state and the diffusion resistance of the external phase boundary film and the membrane leakage.
试验研究了恒定二元水平有压扩散流中的局部非稳态流动现象。
Based on model experiment, the local unsteady phenomenon in 2-d horizontal flow with steady divergent pressure was studied.
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