Numerical study of flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular channels: Dissertation

Seppo Syrjälä

Research output: ThesisDissertation

Abstract

This thesis presents numerical studies on the flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular ducts, and in extruder channels of rectangular cross-section. For both applications hydrodynamically and thermally fully developed flows are studied first, and subsequently more realistic situations involving the effects of thermal development, viscous dissipation and temperature-dependent viscosity are considered. All numerical computations are based on the finite element method, and a marching procedure in the streamwise direction is utilized in the thermally developing situations. A salient feature of the present numerical approach is that it employs higher-order elements with quartic polynomial interpolation functions for dependent variables. In all cases studied the numerical procedure adopted yields consistent performance with respect to mesh refinement, and comparisons with available analytical solutions show very good agreement. The influence of different factors, such as shear-thinning, viscous dissipation and temperature-dependent viscosity, is investigated. In the extrusion flow computations the importance of considering the recirculating flow and associated transverse convection is clearly established.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • Tampere University of Technology (TUT)
Supervisors/Advisors
  • Karvinen, Reijo, Supervisor, External person
Award date9 Dec 1996
Place of PublicationEspoo
Publisher
Print ISBNs951-38-4950-3
Publication statusPublished - 1996
MoE publication typeG5 Doctoral dissertation (article)

Fingerprint

heat transfer
fluids
dissipation
viscosity
dependent variables
shear thinning
theses
ducts
interpolation
finite element method
polynomials
convection
temperature
cross sections

Keywords

  • fluids
  • flow
  • flow measurement
  • ducts
  • hydrodynamics
  • heat transfer
  • numerical analysis
  • finite element analysis
  • viscosity
  • dissipation
  • rectangular bodies
  • temperature

Cite this

Syrjälä, Seppo. / Numerical study of flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular channels : Dissertation. Espoo : VTT Technical Research Centre of Finland, 1996. 130 p.
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title = "Numerical study of flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular channels: Dissertation",
abstract = "This thesis presents numerical studies on the flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular ducts, and in extruder channels of rectangular cross-section. For both applications hydrodynamically and thermally fully developed flows are studied first, and subsequently more realistic situations involving the effects of thermal development, viscous dissipation and temperature-dependent viscosity are considered. All numerical computations are based on the finite element method, and a marching procedure in the streamwise direction is utilized in the thermally developing situations. A salient feature of the present numerical approach is that it employs higher-order elements with quartic polynomial interpolation functions for dependent variables. In all cases studied the numerical procedure adopted yields consistent performance with respect to mesh refinement, and comparisons with available analytical solutions show very good agreement. The influence of different factors, such as shear-thinning, viscous dissipation and temperature-dependent viscosity, is investigated. In the extrusion flow computations the importance of considering the recirculating flow and associated transverse convection is clearly established.",
keywords = "fluids, flow, flow measurement, ducts, hydrodynamics, heat transfer, numerical analysis, finite element analysis, viscosity, dissipation, rectangular bodies, temperature",
author = "Seppo Syrj{\"a}l{\"a}",
year = "1996",
language = "English",
isbn = "951-38-4950-3",
series = "VTT Publications",
publisher = "VTT Technical Research Centre of Finland",
number = "292",
address = "Finland",
school = "Tampere University of Technology (TUT)",

}

Syrjälä, S 1996, 'Numerical study of flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular channels: Dissertation', Doctor Degree, Tampere University of Technology (TUT), Espoo.

Numerical study of flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular channels : Dissertation. / Syrjälä, Seppo.

Espoo : VTT Technical Research Centre of Finland, 1996. 130 p.

Research output: ThesisDissertation

TY - THES

T1 - Numerical study of flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular channels

T2 - Dissertation

AU - Syrjälä, Seppo

PY - 1996

Y1 - 1996

N2 - This thesis presents numerical studies on the flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular ducts, and in extruder channels of rectangular cross-section. For both applications hydrodynamically and thermally fully developed flows are studied first, and subsequently more realistic situations involving the effects of thermal development, viscous dissipation and temperature-dependent viscosity are considered. All numerical computations are based on the finite element method, and a marching procedure in the streamwise direction is utilized in the thermally developing situations. A salient feature of the present numerical approach is that it employs higher-order elements with quartic polynomial interpolation functions for dependent variables. In all cases studied the numerical procedure adopted yields consistent performance with respect to mesh refinement, and comparisons with available analytical solutions show very good agreement. The influence of different factors, such as shear-thinning, viscous dissipation and temperature-dependent viscosity, is investigated. In the extrusion flow computations the importance of considering the recirculating flow and associated transverse convection is clearly established.

AB - This thesis presents numerical studies on the flow and heat transfer behaviour of power-law non-Newtonian fluids in rectangular ducts, and in extruder channels of rectangular cross-section. For both applications hydrodynamically and thermally fully developed flows are studied first, and subsequently more realistic situations involving the effects of thermal development, viscous dissipation and temperature-dependent viscosity are considered. All numerical computations are based on the finite element method, and a marching procedure in the streamwise direction is utilized in the thermally developing situations. A salient feature of the present numerical approach is that it employs higher-order elements with quartic polynomial interpolation functions for dependent variables. In all cases studied the numerical procedure adopted yields consistent performance with respect to mesh refinement, and comparisons with available analytical solutions show very good agreement. The influence of different factors, such as shear-thinning, viscous dissipation and temperature-dependent viscosity, is investigated. In the extrusion flow computations the importance of considering the recirculating flow and associated transverse convection is clearly established.

KW - fluids

KW - flow

KW - flow measurement

KW - ducts

KW - hydrodynamics

KW - heat transfer

KW - numerical analysis

KW - finite element analysis

KW - viscosity

KW - dissipation

KW - rectangular bodies

KW - temperature

M3 - Dissertation

SN - 951-38-4950-3

T3 - VTT Publications

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -