Influence of Temperature on the Spectrum of Water*

Hale, George M.; Querry, Marvin R.; Rusk, Alvin N.; Williams, Dudley

doi:10.1364/josa.62.001103

Cited by 73 publications

(25 citation statements)

References 10 publications

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“…3). Strong radiation flux nonlinearity in droplets is defined by light reflection spectral effects on the droplets surface, which also depends from water temperature [3]. Therefore the droplet surface temperature T R,"c+r" (Fo) function graph remains sensitive regarding droplets dispersity in "c+r" case ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The radiation q c -flux spreads toward the centre of the droplet, while q c -flux direction is defined by temperature field gradient in the droplet. The radiation flux absorption in the droplet and the observed optical effects of light beam reflection and refraction, when crossing the contact surface of water and flue gases, are defined by a complex spectral index of refractionn ω = n ω -ik ω , where n ω and k ω components are finite sizes [3], therefore q c -@ q c + = q r . The radiation flux is calculated according to the spectral radiation model in the droplet [4].…”

Section: The Methodology Of Droplets Phase Transformations Numerical mentioning

confidence: 99%

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The combined heat and mass transit processes of water droplets in biofuel technologies

Ramanauskas¹,

Maziukienė²,

Miliauskas³

2017

energetika

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The number of thermal technologies is based on water droplets heat and mass transfer processes. In this paper droplets heat transfer and phase transformations were modelled in the context of water spraying in humid flue gases application for biofuel combustion technologies. Droplets warming is defined when its surface instantaneous temperature is calculated according to an iterative numerical scheme, which is based on heat fluxes balance that flows in and from the droplet surface. The transfer processes interaction is taken into account. The influence of spraying water temperature, biofuel flue gases temperature and its humidity as well as droplets heating process impact on spraying water droplets transit phase transformation regimes were highlighted. Technological cases of water spraying in a biofuel furnace and heat recovery from removed flue gases were highlighted. In condensing economizers at recovered flue gases sprayed droplets heat transfer conditions are defined by their slipping factor in flue gases, while in the case of biofuel combustion in the furnace, droplets slipping and its surrounding radiation factors are equivalent.

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Section: Resultsmentioning

confidence: 99%

Section: The Methodology Of Droplets Phase Transformations Numerical mentioning

confidence: 99%

The combined heat and mass transit processes of water droplets in biofuel technologies

Ramanauskas¹,

Maziukienė²,

Miliauskas³

2017

energetika

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“…The technique takes into account the radiation absorption inside the droplet and spectral effects on the surface of the contact between air and water. The spectral optical characteristics of water have been investigated very well (e.g., Hale and Querry, 1973;Hale et al, 1972).…”

Section: Evaporation Condensationmentioning

confidence: 99%

Modelling of Combined Heat and Mass Transfer of Water Droplets in Thermal Technology Equipment

Sinkunas¹,

Miliauskas²,

Norvaisiene³

et al. 2012

Frontiers in Heat and Mass Transfer

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Water droplet evaporation process is numerically modelled under various heat and mass transfer conditions. Regularities of heat transfer process interaction are examined. Modelling in this work was performed using the combined analytical -numerical method to investigate heat and mass transfer in the two-phase droplets-gas flow system. The influence of forced liquid circulation on the thermal state of droplets is taken into account by the effective coefficient of thermal conductivity. Calculating the rate of droplet evaporation and the intensity of convective heating, the influence of the Stefan's hydrodynamic flow is taken into account. Balancing energy fluxes in the droplet to within one hundredth of a percent and using the fastest sinking the droplet surface temperature is determined.

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“…Gauss method is used, when expression is integrated according the incidence angle of light beam. The spectral optical characteristics of the semitransparent liquid were taken according [12,13] recommendations. In order to guarantee the stability for numerical scheme, in the iterations for the point time s I the droplet dimension calculated for the point time s IÀ1 is employed.…”

Section: Problem Formulationmentioning

confidence: 99%

“…The droplet slip in flue gas and absorbed radiant flux in it speeds up warming of a droplet, therefore condensation phase transformations regime is shortened. In the case of non-slipping droplet in flue gas a forced (2,9) 75, (3,10) 100, (4,11) 125, (5,12) 150, (6,13) 175, (7,14) 200; g 0 Á (À1) Á 10 7 , kg/s: (1,8) 0.0768, (2,9) water circulation does not occur and conditions to arise natural water circulation are unfavourable [10]. Therefore, the heat flux conductively supplied to a droplet and on its surface dispersed water vapour condensation heat transfer to inner layers of a droplet is not intensive.…”

Section: Influence Of Radiation On Water Droplets Warming In Flue Gasmentioning

confidence: 99%

Evaporation and condensing augmentation of water droplets in flue gas

Sinkunas

Miliauskas

2010

International Journal of Heat and Mass Transfer

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Influence of Temperature on the Spectrum of Water*

Cited by 73 publications

References 10 publications

The combined heat and mass transit processes of water droplets in biofuel technologies

The combined heat and mass transit processes of water droplets in biofuel technologies

Modelling of Combined Heat and Mass Transfer of Water Droplets in Thermal Technology Equipment

Evaporation and condensing augmentation of water droplets in flue gas

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