Nonisothermal modeling of heat transfer inside an internal batch mixer

Yun Bai; Uttandaraman Sundararaj; Krishnaswamy Nandakumar

doi:10.1002/aic.12484

Nonisothermal modeling of heat transfer inside an internal batch mixer

Yun Bai, Uttandaraman Sundararaj^*, Krishnaswamy Nandakumar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

A nonisothermal transient process of temperature increase due to viscous heating was simulated for a 69 cm ³ internal batch mixer (BM) using a computational fluid dynamics (CFD) software, Polyflow 3.9 form ANSYS, Inc., to obtain the temporal temperature distribution and characterize the heat transfer between polymer melt and mixer wall. The melt temperature obtained from simulation was verified with experiments. Starting from a uniform temperature of 463 K, when a rotation speed of 5.24 rad/s is imposed, viscous heating caused a maximum temperature rise of 3 K for a polyethylene (PE) resin, and 6 K for a polystyrene (PS) resin. The transient flow fields inside the batch mixer were characterized with velocity profiles and a mixing index parameter, which show that laminar flow dominates inside the mixer while a small percentage of elongational flow, converging flow, and recirculation flow is also present.

Original language	English
Pages (from-to)	2657-2669
Number of pages	13
Journal	AICHE Journal
Volume	57
Issue number	10
DOIs	https://doi.org/10.1002/aic.12484
State	Published - Oct 2011
Externally published	Yes

Keywords

Batch mixer
Heat transfer
Mixing
Nonisothermal
Polymer processing
Simulation

Access to Document

10.1002/aic.12484

Cite this

@article{cff24e6ec5664bf49fe6453d5aec9ba3,

title = "Nonisothermal modeling of heat transfer inside an internal batch mixer",

abstract = "A nonisothermal transient process of temperature increase due to viscous heating was simulated for a 69 cm 3 internal batch mixer (BM) using a computational fluid dynamics (CFD) software, Polyflow 3.9 form ANSYS, Inc., to obtain the temporal temperature distribution and characterize the heat transfer between polymer melt and mixer wall. The melt temperature obtained from simulation was verified with experiments. Starting from a uniform temperature of 463 K, when a rotation speed of 5.24 rad/s is imposed, viscous heating caused a maximum temperature rise of 3 K for a polyethylene (PE) resin, and 6 K for a polystyrene (PS) resin. The transient flow fields inside the batch mixer were characterized with velocity profiles and a mixing index parameter, which show that laminar flow dominates inside the mixer while a small percentage of elongational flow, converging flow, and recirculation flow is also present.",

keywords = "Batch mixer, Heat transfer, Mixing, Nonisothermal, Polymer processing, Simulation",

author = "Yun Bai and Uttandaraman Sundararaj and Krishnaswamy Nandakumar",

year = "2011",

month = oct,

doi = "10.1002/aic.12484",

language = "英语",

volume = "57",

pages = "2657--2669",

journal = "AICHE Journal",

issn = "0001-1541",

publisher = "Wiley-Blackwell",

number = "10",

}

TY - JOUR

T1 - Nonisothermal modeling of heat transfer inside an internal batch mixer

AU - Bai, Yun

AU - Sundararaj, Uttandaraman

AU - Nandakumar, Krishnaswamy

PY - 2011/10

Y1 - 2011/10

N2 - A nonisothermal transient process of temperature increase due to viscous heating was simulated for a 69 cm 3 internal batch mixer (BM) using a computational fluid dynamics (CFD) software, Polyflow 3.9 form ANSYS, Inc., to obtain the temporal temperature distribution and characterize the heat transfer between polymer melt and mixer wall. The melt temperature obtained from simulation was verified with experiments. Starting from a uniform temperature of 463 K, when a rotation speed of 5.24 rad/s is imposed, viscous heating caused a maximum temperature rise of 3 K for a polyethylene (PE) resin, and 6 K for a polystyrene (PS) resin. The transient flow fields inside the batch mixer were characterized with velocity profiles and a mixing index parameter, which show that laminar flow dominates inside the mixer while a small percentage of elongational flow, converging flow, and recirculation flow is also present.

AB - A nonisothermal transient process of temperature increase due to viscous heating was simulated for a 69 cm 3 internal batch mixer (BM) using a computational fluid dynamics (CFD) software, Polyflow 3.9 form ANSYS, Inc., to obtain the temporal temperature distribution and characterize the heat transfer between polymer melt and mixer wall. The melt temperature obtained from simulation was verified with experiments. Starting from a uniform temperature of 463 K, when a rotation speed of 5.24 rad/s is imposed, viscous heating caused a maximum temperature rise of 3 K for a polyethylene (PE) resin, and 6 K for a polystyrene (PS) resin. The transient flow fields inside the batch mixer were characterized with velocity profiles and a mixing index parameter, which show that laminar flow dominates inside the mixer while a small percentage of elongational flow, converging flow, and recirculation flow is also present.

KW - Batch mixer

KW - Heat transfer

KW - Mixing

KW - Nonisothermal

KW - Polymer processing

KW - Simulation

UR - http://www.scopus.com/inward/record.url?scp=80052613862&partnerID=8YFLogxK

U2 - 10.1002/aic.12484

DO - 10.1002/aic.12484

M3 - 文章

AN - SCOPUS:80052613862

SN - 0001-1541

VL - 57

SP - 2657

EP - 2669

JO - AICHE Journal

JF - AICHE Journal

IS - 10

ER -

Nonisothermal modeling of heat transfer inside an internal batch mixer

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this