Modification and scale-up of the new miniature mixer-apam

TY - CONF

T1 - Modification and scale-up of the new miniature mixer-apam

AU - Bai, Yun

AU - Sundararaj, Uttandaraman

AU - Nandakumar, Krishnaswamy

PY - 2006

Y1 - 2006

N2 - Our previous papers show that the Alberta Polymer Asymmetric Minimixer (APAM, 2ml, see Figure 1) is very effective mixing equipment for blending polymers and nanocomposites in the small scale. There are different capacity requirement for different applications, therefore, more flexible designs of the APAM are needed. For example, to have enough material for mechanical property testing, 10ml or more may be required. The simplest way to have a larger capacity is to increase the radius of the outer cup, which will increase the minimum clearance as well. Another way is to scale up the entire mixer. These changes will definitely affect the flow and thermal fields. In this paper, Polyflow 3.10 (Fluent Inc.) is used to model the transient non-isothermal process of polystyrene in these modified mixers. Simulation results show that it takes longer time for the thermal field to develop with increasing size of the cup and the mixer. The flow fields inside these modified mixers are characterized by radial and axial velocity profiles. The shear rate and shear stress change due to the modification. The transient temperature value at a point increases, and the steady state temperature distribution shows the effect of viscous dissipation.

AB - Our previous papers show that the Alberta Polymer Asymmetric Minimixer (APAM, 2ml, see Figure 1) is very effective mixing equipment for blending polymers and nanocomposites in the small scale. There are different capacity requirement for different applications, therefore, more flexible designs of the APAM are needed. For example, to have enough material for mechanical property testing, 10ml or more may be required. The simplest way to have a larger capacity is to increase the radius of the outer cup, which will increase the minimum clearance as well. Another way is to scale up the entire mixer. These changes will definitely affect the flow and thermal fields. In this paper, Polyflow 3.10 (Fluent Inc.) is used to model the transient non-isothermal process of polystyrene in these modified mixers. Simulation results show that it takes longer time for the thermal field to develop with increasing size of the cup and the mixer. The flow fields inside these modified mixers are characterized by radial and axial velocity profiles. The shear rate and shear stress change due to the modification. The transient temperature value at a point increases, and the steady state temperature distribution shows the effect of viscous dissipation.

KW - Heat transfer

KW - Miniature mixer

KW - Nom-isothermal

KW - Simulation

UR - http://www.scopus.com/inward/record.url?scp=33745597105&partnerID=8YFLogxK

M3 - 论文

AN - SCOPUS:33745597105

SP - 918

EP - 922

T2 - Society of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006

Y2 - 7 May 2006 through 11 May 2006

ER -