The densities and viscosities for solutions of FeSO_4-Fe_2(SO_4)_3-H_2SO_4 were determined with density bottle and capillary viscosimeter at 294.75-341.15 K,0.1-0.8 mol/L of hydrogen ion and 0.1-0.8 mol/L of ferric and ferrous ion.
Using a new algorithm based on Lattice-Boltzmann method,the kinetic viscosities of two mixed refrigerants,R410A and R407C,were calculated with pure refrigerants R32 and R125 as contrastive working fluid.
The results showed when the R was 5～6, the mass fractions of DMPA and TMP were 7.5%～8% and 1% respectively and the neutralization degree was 90%, the stability and viscidity of the prepared emulsions could meet the need of requirement.
Furthermore, the intrinsic definition is just the (now) well-known Crandall-Lions viscosity solution, modified in a natural way to accommodate measurable coefficients.
We describe the main results obtained in a joint work with Athanasopoulos and Caffarelli on the regularity of viscosity solutions and of their free boundaries for a rather general class of parabolic phase transition problems.
The comparion principle for viscosity solutions is proved,the existence and uniqueness results are disscussed.
Compressible navier-stokes equations with density-dependent viscosity
The global existence of solutions to the equations of one-dimensional compressible flow with density-dependent viscosity is proved.
When the content of nano-SiO2 was below 1.5%, the amount of free formaldehyde decreased, and the viscosity and bonding strength of resin increased with an increase in the added nano-SiO2, which did not prolong the curing time.
The results show that the two models are both suitable for predicting the viscosity in the mold filling stage of resin transfer molding (RTM).
However, the engineering model provides a more accurate prediction of the viscosity near the gel point.
The limitation of the engineering model is that it cannot be used to predict the viscosity after cross-linking of the curing system.
It was demonstrated that the higher the values of both parameters, the more rapid the decreases in viscosity and the viscosity-average molecular weight of chitosan.
Theoretical analysis shows that mechanical behavior of the energy reclaiming device is embodied by a viscidity damping parameter and an analogous coulomb damping parameter determined by its structure; their expressions are obtained.
The results showed that the dividing phase of embryo root cells decreased and the viscidity of cells in dividing phase increased when Xingkai Lake pine was infected byC.
The water-conserving membrane will obstruct capillary and increase viscidity of sandy soil, so as to decrease leakage and evaporation in sandy soil.
Both exist as oriented fibrous structures in the secretions, and are responsible for the viscidity.
Strong intermolecular force between soil and closely confined water molecules neither facilitate viscidity nor dissolving.