Lattice Boltzmann Method for the Velocity Analysis of Polymer Melt in Vane Extruder
After some mixed methods in polymer processing are summarized, the new equipment is introduced which is called vane plasticizing extruder with elongational flow field. Then the unit of vane geometry is analyzed, and the analysis method of vane extruder conveying state is put forward by using the lattice Boltzmann method. On this base, physical model and mathematical model are established. Calculation of velocity distribution and quantitative description of the elongational deformation rate shows there has elongational rheological in the vane plasticizing extruder. Periodic extensional flow field has very good mixing effect in polymer processing.
KeywordsVane extruder Lattice Boltzmann method Positive displacement Elongational rheology Normal stress field
The authors wish to acknowledge the National Nature Science Foundation of China(Grant 10872071, 50973035, 50903033, 51073061, and 21174044), National Key Technology R&D Program of China (Grant 2009BAI84B05 and 2009BAI84B06), the Fundamental Research Funds for the Central Universities (NO. 2012ZM0047), Program for New Century Excellent Talents in University (No.NCET-11-0152), Pearl River Talent Fund for Young Sci-Tech Researchers of Guangzhou City (No.2011J2200058), 973 Program (No.2012CB025902) and National Natural Science Foundation of China-Guangdong Joint Foundation Project (U1201242) for their financial supports.
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