Numerical study of polymer melt flow in a three-dimensional sudden expansion: viscous dissipation effects
-
Mustafa Tutar
and
Ali Karakus
Abstract
This numerical paper presents the effects of viscous dissipation on both hydrodynamic flow behavior and thermal flow characteristics of fluid included in rheological polymer flow analysis. The shear rate dependence of the viscosity is modeled using a modified form of the Cross constitutive equation, while the density changes are modeled using the modified Tait state of equation. The Navier-Stokes equations are solved in a sequential, decoupled manner with energy conservation equations using a finite volume method based fluid flow solver. Hydrodynamic and thermal boundary layer developments in an asymmetric sudden expansion for different velocity and melt flow injection temperature boundary and geometry conditions are determined under the influence of viscous dissipation effects and the results are compared with each other to measure the relative effects of viscous dissipation on the interactions of these layers for a commercial polymer melt flow, namely polypropylene (PP). The numerical results demonstrate that proposed mathematical and numerical formulations for viscosity and density variations including viscous heating terms lead to more accurate representation of the polymer melt flow and heat transfer phenomena in plane channels or mold cavity associated with a sudden expansion.
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Articles in the same Issue
- Frontmatter
- Original articles
- Kinetic degradation and storage stability of β-carotene encapsulated by spray drying using almond gum and gum arabic as wall materials
- Photo-polymerization of methacrylate based polymer electrolyte for dye-sensitized solar cell
- Synthesis and characterization of novel hydroxyl-terminated hyperbranched polyurethanes
- Electron beam modified nylon 6-clay nanocomposites: morphology and water absorption behavior
- The effect of ultraviolet irradiation and temperature on the resilience of high density polyethylene
- Polyaminoamide dendrimers surface-modified with anionic terminal groups for use as calcium carbonate scale inhibitors
- Technical feasibility of a new approach to electromagnetic interference (EMI) shielding of injection molded parts using in-mold coated (IMC) nanopaper
- Study on crystallization performance of polyethylene terephthalate/polybutylene terephthalate alloys
- Numerical study of polymer melt flow in a three-dimensional sudden expansion: viscous dissipation effects
- Enhancement of mechanical properties of polypropylene by blending with styrene-(ethylene-butylene)-styrene tri-block copolymer
- Development and fabrication of cement reinforced polypropylene composite material spur gear
