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A dynamic object-oriented model for efficient simulation of fluid dispersion in turbulent flow with varying fluid properties

Skoglund, Tomas LU and Dejmek, Petr LU (2007) In Chemical Engineering Science 62(8). p.2168-2178
Abstract
Dispersion coefficients for turbulent flow are commonly available, but the common models are not easily implemented for fast computation of dispersion in time-dependent large flow systems.



Criteria were developed to aid in the choice of parameters for a model combining plug flow with the N-continuously stirred-tanks model to obtain the best agreement with the pure axial-dispersed plug-flow model, while simultaneously being computationally efficient. Solution accuracy and computational savings were demonstrated for a realistic food industry example. The proposed model includes a method of structuring the discretisation to handle the simulation of pressure drop and momentum balance simultaneously with simulation of... (More)
Dispersion coefficients for turbulent flow are commonly available, but the common models are not easily implemented for fast computation of dispersion in time-dependent large flow systems.



Criteria were developed to aid in the choice of parameters for a model combining plug flow with the N-continuously stirred-tanks model to obtain the best agreement with the pure axial-dispersed plug-flow model, while simultaneously being computationally efficient. Solution accuracy and computational savings were demonstrated for a realistic food industry example. The proposed model includes a method of structuring the discretisation to handle the simulation of pressure drop and momentum balance simultaneously with simulation of dispersion.



The criteria were derived from the analysis of Laplace transforms. It was also shown that the proposed model predicts the response to a step change in concentration in agreement with the exact solution of the axial-dispersed plug-flow model.



The model was written in the object-oriented language Modelica as an object in a library structure which is being developed to simulate complex liquid food process lines and their control systems. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dynamic simulation, Dynamic model, Fluid property transition, Dispersion, Residence time distribution, Liquid food
in
Chemical Engineering Science
volume
62
issue
8
pages
2168 - 2178
publisher
Elsevier
external identifiers
  • wos:000245770300004
  • scopus:33947232156
ISSN
0009-2509
DOI
10.1016/j.ces.2006.12.067
language
English
LU publication?
yes
id
ed478025-ae33-476a-ad76-daedbbe6421f (old id 578220)
date added to LUP
2007-12-04 14:14:24
date last changed
2017-10-01 04:40:10
@article{ed478025-ae33-476a-ad76-daedbbe6421f,
  abstract     = {Dispersion coefficients for turbulent flow are commonly available, but the common models are not easily implemented for fast computation of dispersion in time-dependent large flow systems.<br/><br>
<br/><br>
Criteria were developed to aid in the choice of parameters for a model combining plug flow with the N-continuously stirred-tanks model to obtain the best agreement with the pure axial-dispersed plug-flow model, while simultaneously being computationally efficient. Solution accuracy and computational savings were demonstrated for a realistic food industry example. The proposed model includes a method of structuring the discretisation to handle the simulation of pressure drop and momentum balance simultaneously with simulation of dispersion.<br/><br>
<br/><br>
The criteria were derived from the analysis of Laplace transforms. It was also shown that the proposed model predicts the response to a step change in concentration in agreement with the exact solution of the axial-dispersed plug-flow model.<br/><br>
<br/><br>
The model was written in the object-oriented language Modelica as an object in a library structure which is being developed to simulate complex liquid food process lines and their control systems.},
  author       = {Skoglund, Tomas and Dejmek, Petr},
  issn         = {0009-2509},
  keyword      = {Dynamic simulation,Dynamic model,Fluid property transition,Dispersion,Residence time distribution,Liquid food},
  language     = {eng},
  number       = {8},
  pages        = {2168--2178},
  publisher    = {Elsevier},
  series       = {Chemical Engineering Science},
  title        = {A dynamic object-oriented model for efficient simulation of fluid dispersion in turbulent flow with varying fluid properties},
  url          = {http://dx.doi.org/10.1016/j.ces.2006.12.067},
  volume       = {62},
  year         = {2007},
}