Three-Dimensional Jet Impingement Boiling on a Flat Plate
Year
: 2018
Abstract: The non-axisymmetric three-dimensional boiling flow of a
planar impinging jet on a hot flat plate has been investigated by
using similarity solution approach, taking into account
additional diffusivity terms in momentum and energy equations
as a result of bubble-induced mixing in flow. The free jet stream
along z-direction impinges on the surface and produces a flow
with different velocity components. The governing equations
have been transformed into ordinary differential equations by
introducing appropriate similarity variables and an exact
solution has been obtained for three-dimensional flow boiling
problem for the first time. The total heat flux, transferred from
the surface to the flow has been estimated as summation of the
single-phase heat transfer due to forced convection and the
nucleate boiling heat flux due to bubble-induced diffusion. The
effects of the velocity components ratio ( ) and the ratio
between the maximum total diffusivity to the molecular
diffusivity ( + ) on the flow field and heat transfer
characteristics have been obtained and discussed and illustrated
graphically. Also, a comparison of the predicted heat flux has
been made with previously published experimental data. A
reasonable accuracy of the results in the range of -32% to 0.5%
with average deviation of 15.7% from the experimental data for
three-dimensional simulation, and in the range of -35% to -
3.5% with average deviation of 19% for two-dimensional case,
simplified simulation of the three-dimensional problem, has
been obtained. As expected, the average deviation values show
relatively more accurate results for the three-dimensional
simulation than the two-dimensional one because of being
closer to the experimental conditions.
planar impinging jet on a hot flat plate has been investigated by
using similarity solution approach, taking into account
additional diffusivity terms in momentum and energy equations
as a result of bubble-induced mixing in flow. The free jet stream
along z-direction impinges on the surface and produces a flow
with different velocity components. The governing equations
have been transformed into ordinary differential equations by
introducing appropriate similarity variables and an exact
solution has been obtained for three-dimensional flow boiling
problem for the first time. The total heat flux, transferred from
the surface to the flow has been estimated as summation of the
single-phase heat transfer due to forced convection and the
nucleate boiling heat flux due to bubble-induced diffusion. The
effects of the velocity components ratio ( ) and the ratio
between the maximum total diffusivity to the molecular
diffusivity ( + ) on the flow field and heat transfer
characteristics have been obtained and discussed and illustrated
graphically. Also, a comparison of the predicted heat flux has
been made with previously published experimental data. A
reasonable accuracy of the results in the range of -32% to 0.5%
with average deviation of 15.7% from the experimental data for
three-dimensional simulation, and in the range of -35% to -
3.5% with average deviation of 19% for two-dimensional case,
simplified simulation of the three-dimensional problem, has
been obtained. As expected, the average deviation values show
relatively more accurate results for the three-dimensional
simulation than the two-dimensional one because of being
closer to the experimental conditions.
Keyword(s): Three-Dimensional Jet- Impingement -Boiling on a Flat Plate
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Three-Dimensional Jet Impingement Boiling on a Flat Plate
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| contributor author | اصغر برادران رحیمی | en |
| contributor author | Asgar Bradaran Rahimi | fa |
| date accessioned | 2020-06-06T14:28:13Z | |
| date available | 2020-06-06T14:28:13Z | |
| date copyright | 7/15/2018 | |
| date issued | 2018 | |
| identifier uri | https://libsearch.um.ac.ir:443/fum/handle/fum/3397997 | |
| description abstract | The non-axisymmetric three-dimensional boiling flow of a planar impinging jet on a hot flat plate has been investigated by using similarity solution approach, taking into account additional diffusivity terms in momentum and energy equations as a result of bubble-induced mixing in flow. The free jet stream along z-direction impinges on the surface and produces a flow with different velocity components. The governing equations have been transformed into ordinary differential equations by introducing appropriate similarity variables and an exact solution has been obtained for three-dimensional flow boiling problem for the first time. The total heat flux, transferred from the surface to the flow has been estimated as summation of the single-phase heat transfer due to forced convection and the nucleate boiling heat flux due to bubble-induced diffusion. The effects of the velocity components ratio ( ) and the ratio between the maximum total diffusivity to the molecular diffusivity ( + ) on the flow field and heat transfer characteristics have been obtained and discussed and illustrated graphically. Also, a comparison of the predicted heat flux has been made with previously published experimental data. A reasonable accuracy of the results in the range of -32% to 0.5% with average deviation of 15.7% from the experimental data for three-dimensional simulation, and in the range of -35% to - 3.5% with average deviation of 19% for two-dimensional case, simplified simulation of the three-dimensional problem, has been obtained. As expected, the average deviation values show relatively more accurate results for the three-dimensional simulation than the two-dimensional one because of being closer to the experimental conditions. | en |
| language | English | |
| title | Three-Dimensional Jet Impingement Boiling on a Flat Plate | en |
| type | Conference Paper | |
| contenttype | External Fulltext | |
| subject keywords | Three-Dimensional Jet- Impingement -Boiling on a Flat Plate | en |
| identifier link | https://profdoc.um.ac.ir/paper-abstract-1068510.html | |
| conference title | ASME 2018 5th Joint Us-European Engineering Summer Conference | en |
| conference title | پنجمین کنفرانس تابستانی مشترک آمریکا و اروپا در مهندسی سیالات | fa |
| conference location | Quebec | en |
| conference location | کبک | fa |
| identifier articleid | 1068510 |


