The Primary Study On The Dynamic Mechanism Of Wood Collapse

The wood cells collapse source dynamic is one of the core issues about the research on the mechanism of wood collapse. This paper is a part of the project which the research on the source dynamic and formation mechanism of wood cells collapse, is supported by National Nature Science Fund Project. On the basic of the foregoing research by Shouzeng Zhuang et al., this paper primarily was worked about some tests on measurement to liquids tensile force produced in flat plate glassy capillary column modeling, and studied on the correlated issues about constructing the model, made a further investigation and analysis.Firstly, some research on the material surface property was done. Applications in the optics theory, made some experimental researches on the water films middle in duplet flat plate glassy, the films form interferometric fringes. The experiment is used in choosing the best surface flatness coarseness with the mini flat plate glassy module, for offering theories foundation and sums shortcut methods for the above research. We applied analyses legalists method measuring flat plate glassy capillary column-water films and got an average thick of the water films. Measured contacting angles formed between the double-flat plate glassy with purified water and ethyl alcohol.Secondly, on the basis of designed experiments by Shouzeng Zhuang et al., this paper elementarily proposed one kind of better measurement approach. In this paper, the adoption of electrons omnipotent test machine measuring the fluid films tensile force process of formation in the double-flat plate glassy capillary column, this method is the first time adopted. Two different kinds of surface roughness flat plate glassy and two different surface tension liquids (purified water and analyses purely ethyl alcohol) were adopted as material of tensile force measurement. The all results indicated that liquid films is produced in the interior of the double-flat plate glassy capillary column tensile force, its rule is not to follow the traditional"Young-Laplace equation"exactly.Finally, in this paper, one measurement unit was designed, adopted pressure sensor to directly measure interior liquid films of the double-flat plate glassy capillary column. Separately in this test directly measured mini liquid drops of purified water and mercury pressure and liquids tensile force and their transportation processes. The results indicated that flat plate glassy capillary column concave or convex liquid surface tension produce negative intensity of pressure dose not follow"Young-Laplace equation"as well.These results preliminarily showed that the research on the dynamical source of lumber cell collapse which is insighted from capillary negative intensity of pressure is doubted. The conventional viewpoints is putting forward doubting.