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本文针对可压缩流体在木材中渗透时出现的粘性流、滑流与非线性流，根据木材解剖构造特性运用统计物理和流体力学有关理论，分析讨论了粘性流、滑流与非线性流产生的原因和机理，及其与木材中可压缩流体渗透性的关系。粘性流存在于木材中流体通过的所有孔隙，而滑流存在于木材中满足滑流产生条件的那部分孔隙中。在通常的渗透压强条件下Ｒｅ≤１０，木材中流体渗透的流动型态不存在湍流。流体动能损失导致的非线性流的出现，使可压缩流体的流动特性偏离达西定律，当使用Ｋｌｉｎｋｅｎｂｅｒｇ方程和Ａｄｚｕｍｉ方程分析测量数据研究木材可压缩流体渗透性时，要注意非线性流的影响，降低渗透压强能减少或避免非线性流。木材可压缩流体渗透性与可压缩流体的流动型态间有一定关联。
In this paper, viscous flow, slip flow and non-linear flow occur when wood is infiltrated into compressible fluid. According to the anatomical characteristics of wood, statistical physics and fluid mechanics theory are used to analyze the viscous flow, slip flow and nonlinear flow The reason and mechanism, and its relationship with the permeability of compressible fluid in wood. The viscous flow is present in all the pores through which the fluid passes in the wood, while the slip flow is present in the part of the pores in the wood that satisfies the slipstream conditions. Under the usual conditions of osmotic pressure, Re ≤ 10, there is no turbulence in the flow pattern of fluid infiltration in wood. The nonlinear flow caused by the loss of hydrodynamic energy deviates the flow characteristics of compressible fluid from Darcy’s law. When using the Klinkenberg equation and Adzumi equation to analyze the measured data to study the compressibility of wood, we should pay attention to the influence of nonlinear flow, Lowering the osmotic pressure reduces or avoids nonlinear flow. Wood compressible fluid permeability and compressible fluid flow patterns have a certain relationship between.