basic viscosity
4.Navier-Stokes Equations is the basic model in fluid dynamics. When viscosity tends to 0, the solution to Navier-Stokes Equations tends to that of corresponding Euler Equations ([28]). By a coordinate transformation, the discussion on the behavior of solutions as viscosity vanishes can be converted to that of the large time behavior of the solutions to Navier-Stokes Equations with fixed viscosity.
6.The results from basic properties,shear resistance,pressure strength and point film test show that different low molecular polyamide may affect extrodinary by the properties of cured expoxy resin??the higher viscosity,the lower cured activity(rate);the higher amine number,the stronger cure construction.The cured expoxy resin will prossess unfavourable mechanics when it is cured by the polyamide with both too high viscosity and amine number.
8.Furthermore,according to basic logarithm formula of velocity distribution,unified formula of Karman constant κ for the flow with high and low concentration has been reasonably expressed by using relative viscosity index μ_r to be related to concentration and grain diameter distribution. Finally,by comparing and verifying for two kinds of velocity formulas,the unified laws of logarithm velocity distribution with both Karman-Prandtle velocity and Karman constant κ has been analyzed and verified by using measured velocity data in the coal powder tests.
9.Based on the former workers′ study results such as numerical simulation of fluid mechanics, seismic tomography of the whole earth and igneous rocks, the basic characte- ristics of mantle plumes are summarized in detail, namely the mantle plume, from the D″ layer near the core-mantle boundary (CMB) 2 900 km deep, is characterized by the shape of large head and thin narrow conduit, by the physical property of high temperature and low viscosity.
