Title :
Comparative study of fluid dispensing modeling
Author :
Hong, Yi-Ping ; Li, Han-Xiong
Author_Institution :
Dept. of Fluid Machinery & Fluid Eng., China Agric. Univ., Beijing, China
Abstract :
Computational fluid dynamics is used to calculate flows in the time-pressure dispenser. The analysis of different factors such as the yield stress, the power-law constants, the needle length, etc. will be useful in understanding the dispensing mechanism and thus allow for performance improvement. The numerical solution can provide more information about the wall shear stress and the pressure drop caused by a sudden contraction. The approximation error associated with the analytical method can be understood through comparison with the numerical results. Thus, an approximation compensation model may be derived for the analytical method to improve modeling accuracy.
Keywords :
computational fluid dynamics; non-Newtonian fluids; numerical analysis; packaging; stress measurement; viscosity; analytical method; approximation compensation model; approximation error; computational fluid dynamics; dispensing mechanism; flow rate; flows calculation; fluid dispensing modeling; modeling accuracy; needle length; nonnewtonian viscosity; numerical solution; power-law constants; time-pressure dispenser; wall shear stress; Agricultural engineering; Analytical models; Approximation error; Fluid dynamics; Kinetic energy; Needles; Performance analysis; Surface-mount technology; Tensile stress; Viscosity;
Journal_Title :
Electronics Packaging Manufacturing, IEEE Transactions on
DOI :
10.1109/TEPM.2003.820823
