Characterization of gas transport inside a package
(2009)Department of Energy Sciences
- Abstract
- A study of a sterilizing flow in a package is done. The study is done with the
commercial code Fluent using Large Eddy Simulation and validated with both
Laser Induced Fluorescence and Particle Image Velociometry.
The velocity field is examined in several ways; with changes in grid size, inlet
conditions and sub-grid scale models. The study showed that the most
important parameter is the size and form of the control volumes. A comparison
with the PIV data shows that the simulations have lower velocity in the lower
part of the package and more turbulent fluctuations in the whole package.
The concentration study is done with two different geometries, a larger with a
7 percent larger volume than the smaller. The grids of the two... (More) - A study of a sterilizing flow in a package is done. The study is done with the
commercial code Fluent using Large Eddy Simulation and validated with both
Laser Induced Fluorescence and Particle Image Velociometry.
The velocity field is examined in several ways; with changes in grid size, inlet
conditions and sub-grid scale models. The study showed that the most
important parameter is the size and form of the control volumes. A comparison
with the PIV data shows that the simulations have lower velocity in the lower
part of the package and more turbulent fluctuations in the whole package.
The concentration study is done with two different geometries, a larger with a
7 percent larger volume than the smaller. The grids of the two geometries
differs in the way that the small package has only hexahedral cell and the large
package also has some tetrahedral cells in the bottom. A comparison to LIF
data shows that the simulations of the small package match really well both in
the top and in the bottom of the package. The simulations of the large package
match well in the top but have a lower concentration level at the bottom. This
could be explained by the tetrahedral cells which generate more numerical
diffusion. A comparison between the large and the small package shows only a
small difference of concentration over time. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/1549716
- author
- Jonsson, Madeleine
- supervisor
- organization
- year
- 2009
- type
- H1 - Master's Degree (One Year)
- subject
- keywords
- gas transport Large Eddy simulation laser induced fluorescence particle image velociometry
- report number
- ISRN LUTMDN/TMHP--09/5199--SE
- ISSN
- 0282-1990
- language
- English
- id
- 1549716
- date added to LUP
- 2010-02-23 14:12:54
- date last changed
- 2010-02-23 14:12:54
@misc{1549716, abstract = {{A study of a sterilizing flow in a package is done. The study is done with the commercial code Fluent using Large Eddy Simulation and validated with both Laser Induced Fluorescence and Particle Image Velociometry. The velocity field is examined in several ways; with changes in grid size, inlet conditions and sub-grid scale models. The study showed that the most important parameter is the size and form of the control volumes. A comparison with the PIV data shows that the simulations have lower velocity in the lower part of the package and more turbulent fluctuations in the whole package. The concentration study is done with two different geometries, a larger with a 7 percent larger volume than the smaller. The grids of the two geometries differs in the way that the small package has only hexahedral cell and the large package also has some tetrahedral cells in the bottom. A comparison to LIF data shows that the simulations of the small package match really well both in the top and in the bottom of the package. The simulations of the large package match well in the top but have a lower concentration level at the bottom. This could be explained by the tetrahedral cells which generate more numerical diffusion. A comparison between the large and the small package shows only a small difference of concentration over time.}}, author = {{Jonsson, Madeleine}}, issn = {{0282-1990}}, language = {{eng}}, note = {{Student Paper}}, title = {{Characterization of gas transport inside a package}}, year = {{2009}}, }