Thermal Radiation Modeling in Numerical Simulation of Melt-Coolant Interaction

Dombrovsky, Leonid A.; Davydov, M. V.; Kudinov, Pavel

doi:10.1615/computthermalscien.v1.i1.10

Cited by 28 publications

(5 citation statements)

References 43 publications

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“…It is assumed that there is no radiative transfer between the neighboring layers. As a result, the radiation model is z -direction is similar to the Large-Cell Model suggested in (Dombrovsky, 2007) and employed in papers (Dombrovsky, 2009;Dombrovsky et al, 2009). …”

Section: Radiative Transfer Modelmentioning

confidence: 89%

Shielding of Fire Radiation With the Use of Multi-Layered Water Mist Curtains: Preliminary Estimates

Dombrovsky

Dembele

Wen

2016

Comput Thermal Scien

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Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. Publisher's statement:Published version : http://www.dl.begellhouse.com/journals/648192910890cd0e,1e6659ad3a62cac6,38f69f0e2 e9039e0.html A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription.For more information, please contact the WRAP Team at: wrap@warwick.ac.uk SHIELDING OF FIRE RADIATION WITH THE USE OF MULTI-LAYERED WATER MIST CURTAINS: PRELIMINARY ESTIMATES

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Section: Radiative Transfer Modelmentioning

confidence: 89%

Shielding of Fire Radiation With the Use of Multi-Layered Water Mist Curtains: Preliminary Estimates

Dombrovsky

Dembele

Wen

2016

Comput Thermal Scien

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Section: Radiative Transfer Modelmentioning

confidence: 94%

Shielding of Fire Radiation With the Use of Multi-Layered Water Mist Curtains: Preliminary Estimates

Dombrovsky

Dembele

Wen

2016

Proceeding of Proceedings of the 8th International Symposium on Radiative Transfer, RAD-16 June 6-10,2016, Cappadocia, Turkey

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2016) Shielding of fire radiation with the use of multi-layered water mist curtains : preliminary estimates.ABSTRACT An approximate solution for the complete problem of attenuation of fire radiation by water mist is presented. This solution is based on simplified approaches for the spectral radiative properties of water droplets, the radiative transfer in the absorbing and scattering mist, and transient heat transfer taking into account partial evaporation of water mist. An analysis of the example * The present paper is a revised version of the conference paper presented at 8th International Symposium on Radiative Transfer (June 6-9, Cappadocia, Turkey, 2016).

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“…The latent heat of ice melting was accounted for by an equivalent increase in the heat capacity in a narrow temperature range near the melting temperature. This technique was successfully used in (Dombrovsky et al, 2009;Dombrovsky et al 2015;Dombrovsky et al 2019). It is interesting that the three cited papers considered completely different problems: the first of them dealt with the solidification of core melt droplets in a severe nuclear reactor accident, the second one with the freezing and thawing of biological tissues in cryosurgery, and the third one with the melting of freezing snow under periodic solar heating.…”

Section: Transient Heat Transfer Modelmentioning

confidence: 99%

Deep Heating of a Snowpack by Solar Radiation

Dombrovsky¹,

Kokhanovsky²

2022

Front. Therm. Eng.

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The observed gradual change in the Earth’s climate most noticeably affects the snow cover and ice sheets in the polar regions, especially during the long polar summer, when solar radiation leads to considerable increase in temperature and partial melting at some distance from the snow or ice surface. This effect, which in the polar regions is more pronounced in the snow cover, deserves serious attention as an important geophysical problem. In this article, for the first time, a theoretical analysis is made of the conditions under which the absorption of directional radiation penetrating a weakly absorbing scattering medium has a maximum at some distance from the illuminated surface. It is shown that the maximum absorption of radiation inside an optically thick medium exists only at illumination angles less than 60° from the normal. An analytical solution was obtained that gives both the magnitude of this maximum absorption and its depth below the illuminated surface. Calculations of solar radiation transfer and heat propagation in the snow layer are also performed. Various experimental data on the ice absorption index in the visible range are taken into account when determining the optical properties of snow. To calculate the transient temperature profile in the snow layer, the heat conduction equation with volumetric absorption of radiation is solved. The boundary conditions take into account the variation of solar irradiation, convective heat transfer, and radiative cooling of snow in the infrared transparency window of the cloudless atmosphere. The calculations show that the radiative cooling should be taken into account even during the polar summer.

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Thermal Radiation Modeling in Numerical Simulation of Melt-Coolant Interaction

Cited by 28 publications

References 43 publications

Shielding of Fire Radiation With the Use of Multi-Layered Water Mist Curtains: Preliminary Estimates

Shielding of Fire Radiation With the Use of Multi-Layered Water Mist Curtains: Preliminary Estimates

Shielding of Fire Radiation With the Use of Multi-Layered Water Mist Curtains: Preliminary Estimates

Deep Heating of a Snowpack by Solar Radiation

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