Flow and heat transfer in a particle laden differentially heated cavity

Jarmo Kalilainen, Pekka Rantanen, T Lind, A Dehbi, Ari Auvinen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Differentially heated cavity with Aerosol in turbulent NAtural convection (DIANA) facility was constructed in order to experimentally investigate the effects of turbulent natural convection to aerosol deposition inside the cavity with two isothermal side walls and adiabatic top, bottom and lateral walls. DIANA facility contains two heated / cooled walls made of aluminum. The top, front and back walls are made of glass in order to allow optical access to the cavity. In the experimental work, cavity atmosphere consisted of air and the hot and cold wall temperatures were set to approximately 57.5 °C and 18 °C, respectively. This sets the Rayleigh number of the flow to an approximate value 109, which was also used in the previous simulation work. Measured temperatures differed from the previous DNS data especially near the top and bottom walls. Model of a 2-D cavity was created using Ansys Fluent 14 and the effect of thermal radiation on cavity temperature was investigated. The Fluent calculations indicated that even though small, compared to heat transfer by other mechanisms radiation heat transfer is significant inside a differentially heated cavity. Flow field at the x-y plane of DIANA cavity was investigate using Particle Image Velocimetry (PIV). The PIV measurements showed that the flow circles the cavity near the top and the bottom and the isothermal side walls, whereas the stratified zone at the center of the cavity is relatively stagnant
Original languageEnglish
Title of host publicationProceedings of 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-15)
EditionUSB flash drive
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
Event15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-15 - Pisa, Italy
Duration: 12 May 201315 May 2013

Conference

Conference15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-15
Abbreviated titleNURETH-15
CountryItaly
CityPisa
Period12/05/1315/05/13

Fingerprint

heat transfer
cavities
particle image velocimetry
free convection
aerosols
cold walls
wall temperature
thermal radiation
Rayleigh number
direct numerical simulation
flow distribution
aluminum
atmospheres
temperature
glass
air
radiation
simulation

Cite this

Kalilainen, J., Rantanen, P., Lind, T., Dehbi, A., & Auvinen, A. (2013). Flow and heat transfer in a particle laden differentially heated cavity. In Proceedings of 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-15) (USB flash drive ed.)
Kalilainen, Jarmo ; Rantanen, Pekka ; Lind, T ; Dehbi, A ; Auvinen, Ari. / Flow and heat transfer in a particle laden differentially heated cavity. Proceedings of 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-15). USB flash drive. ed. 2013.
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title = "Flow and heat transfer in a particle laden differentially heated cavity",
abstract = "Differentially heated cavity with Aerosol in turbulent NAtural convection (DIANA) facility was constructed in order to experimentally investigate the effects of turbulent natural convection to aerosol deposition inside the cavity with two isothermal side walls and adiabatic top, bottom and lateral walls. DIANA facility contains two heated / cooled walls made of aluminum. The top, front and back walls are made of glass in order to allow optical access to the cavity. In the experimental work, cavity atmosphere consisted of air and the hot and cold wall temperatures were set to approximately 57.5 °C and 18 °C, respectively. This sets the Rayleigh number of the flow to an approximate value 109, which was also used in the previous simulation work. Measured temperatures differed from the previous DNS data especially near the top and bottom walls. Model of a 2-D cavity was created using Ansys Fluent 14 and the effect of thermal radiation on cavity temperature was investigated. The Fluent calculations indicated that even though small, compared to heat transfer by other mechanisms radiation heat transfer is significant inside a differentially heated cavity. Flow field at the x-y plane of DIANA cavity was investigate using Particle Image Velocimetry (PIV). The PIV measurements showed that the flow circles the cavity near the top and the bottom and the isothermal side walls, whereas the stratified zone at the center of the cavity is relatively stagnant",
author = "Jarmo Kalilainen and Pekka Rantanen and T Lind and A Dehbi and Ari Auvinen",
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Kalilainen, J, Rantanen, P, Lind, T, Dehbi, A & Auvinen, A 2013, Flow and heat transfer in a particle laden differentially heated cavity. in Proceedings of 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-15). USB flash drive edn, 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-15, Pisa, Italy, 12/05/13.

Flow and heat transfer in a particle laden differentially heated cavity. / Kalilainen, Jarmo; Rantanen, Pekka; Lind, T; Dehbi, A; Auvinen, Ari.

Proceedings of 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-15). USB flash drive. ed. 2013.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Flow and heat transfer in a particle laden differentially heated cavity

AU - Kalilainen, Jarmo

AU - Rantanen, Pekka

AU - Lind, T

AU - Dehbi, A

AU - Auvinen, Ari

N1 - Project code: TRAFI 77652

PY - 2013

Y1 - 2013

N2 - Differentially heated cavity with Aerosol in turbulent NAtural convection (DIANA) facility was constructed in order to experimentally investigate the effects of turbulent natural convection to aerosol deposition inside the cavity with two isothermal side walls and adiabatic top, bottom and lateral walls. DIANA facility contains two heated / cooled walls made of aluminum. The top, front and back walls are made of glass in order to allow optical access to the cavity. In the experimental work, cavity atmosphere consisted of air and the hot and cold wall temperatures were set to approximately 57.5 °C and 18 °C, respectively. This sets the Rayleigh number of the flow to an approximate value 109, which was also used in the previous simulation work. Measured temperatures differed from the previous DNS data especially near the top and bottom walls. Model of a 2-D cavity was created using Ansys Fluent 14 and the effect of thermal radiation on cavity temperature was investigated. The Fluent calculations indicated that even though small, compared to heat transfer by other mechanisms radiation heat transfer is significant inside a differentially heated cavity. Flow field at the x-y plane of DIANA cavity was investigate using Particle Image Velocimetry (PIV). The PIV measurements showed that the flow circles the cavity near the top and the bottom and the isothermal side walls, whereas the stratified zone at the center of the cavity is relatively stagnant

AB - Differentially heated cavity with Aerosol in turbulent NAtural convection (DIANA) facility was constructed in order to experimentally investigate the effects of turbulent natural convection to aerosol deposition inside the cavity with two isothermal side walls and adiabatic top, bottom and lateral walls. DIANA facility contains two heated / cooled walls made of aluminum. The top, front and back walls are made of glass in order to allow optical access to the cavity. In the experimental work, cavity atmosphere consisted of air and the hot and cold wall temperatures were set to approximately 57.5 °C and 18 °C, respectively. This sets the Rayleigh number of the flow to an approximate value 109, which was also used in the previous simulation work. Measured temperatures differed from the previous DNS data especially near the top and bottom walls. Model of a 2-D cavity was created using Ansys Fluent 14 and the effect of thermal radiation on cavity temperature was investigated. The Fluent calculations indicated that even though small, compared to heat transfer by other mechanisms radiation heat transfer is significant inside a differentially heated cavity. Flow field at the x-y plane of DIANA cavity was investigate using Particle Image Velocimetry (PIV). The PIV measurements showed that the flow circles the cavity near the top and the bottom and the isothermal side walls, whereas the stratified zone at the center of the cavity is relatively stagnant

M3 - Conference article in proceedings

BT - Proceedings of 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-15)

ER -

Kalilainen J, Rantanen P, Lind T, Dehbi A, Auvinen A. Flow and heat transfer in a particle laden differentially heated cavity. In Proceedings of 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-15). USB flash drive ed. 2013