On the basis of Navier-Stockes equation and convection-diffusion equation, combined with surface tension and penetration models, the equations of moment and mass transfer between bubble and the ambient non-Newtonian l...On the basis of Navier-Stockes equation and convection-diffusion equation, combined with surface tension and penetration models, the equations of moment and mass transfer between bubble and the ambient non-Newtonian liquid were established. The formation of a single bubble from a submersed nozzle of 1.0 mm diameter and the mass transfer from an artificially fixed bubble into the ambient liquid were simulated by the volume-of-fluid （VOF） method. Good agreement between simulation results and experimental data confirmed the validity of the numerical method. Furthermore, the concentration distribution around rising bubbles in shear thinning non-Newtonian fluid was simulated. When the process of a single ellipsoidal bubble with the bubble deformation rate below 2.0 rises, the concentration distribution is a single-tail in the bubble＇s wake, but it is fractal when thebubble deformation rate is greater than 2.0. For the overtaking of two in-line rising bubbles, the concentration distribution area between two bubbles broadens gradually and then coalescence occurs. The bifurcation of concentration distribution appears in the rear of the resultant bubble.展开更多
The global apparel fabrics and accessories industry is gearing up for its key spring summit–one of the trade fair highlights of the year where the entire sector gathers to do business,discover the latest fashion tren...The global apparel fabrics and accessories industry is gearing up for its key spring summit–one of the trade fair highlights of the year where the entire sector gathers to do business,discover the latest fashion trends,find new innovations and discuss what’s in store for the year ahead.展开更多
To be a real financial center, you must become a magnet for global financial activity. If the Shanghai stock market aims to become China＇s financial center, the Hong Kong Stock Exchange should strive to become East A...To be a real financial center, you must become a magnet for global financial activity. If the Shanghai stock market aims to become China＇s financial center, the Hong Kong Stock Exchange should strive to become East Asia＇s financial center. It should be actively pursuing the world＇s biggest companies, not scrabbling about for the limited number of red chips.展开更多
基金Supported by the National iqatural Science Foundation of China （21076139）.
文摘On the basis of Navier-Stockes equation and convection-diffusion equation, combined with surface tension and penetration models, the equations of moment and mass transfer between bubble and the ambient non-Newtonian liquid were established. The formation of a single bubble from a submersed nozzle of 1.0 mm diameter and the mass transfer from an artificially fixed bubble into the ambient liquid were simulated by the volume-of-fluid （VOF） method. Good agreement between simulation results and experimental data confirmed the validity of the numerical method. Furthermore, the concentration distribution around rising bubbles in shear thinning non-Newtonian fluid was simulated. When the process of a single ellipsoidal bubble with the bubble deformation rate below 2.0 rises, the concentration distribution is a single-tail in the bubble＇s wake, but it is fractal when thebubble deformation rate is greater than 2.0. For the overtaking of two in-line rising bubbles, the concentration distribution area between two bubbles broadens gradually and then coalescence occurs. The bifurcation of concentration distribution appears in the rear of the resultant bubble.
文摘The global apparel fabrics and accessories industry is gearing up for its key spring summit–one of the trade fair highlights of the year where the entire sector gathers to do business,discover the latest fashion trends,find new innovations and discuss what’s in store for the year ahead.
文摘To be a real financial center, you must become a magnet for global financial activity. If the Shanghai stock market aims to become China＇s financial center, the Hong Kong Stock Exchange should strive to become East Asia＇s financial center. It should be actively pursuing the world＇s biggest companies, not scrabbling about for the limited number of red chips.
