Temperature dynamics of a transparent nanoliquid acted on by a periodic light field

Livashvili, A. I.; Kostina, G.; Yakunina, Margarita

doi:10.1364/jot.80.000124

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…These results demonstrate that the investigated nanofluid has great potential as a coolant for the co-production of heat and energy in completely new hybrid flat solar thermal collectors, for which top heating geometry is required. The main mechanisms for optical nonlinearity in these cases are the phenomena of thermal diffusion and electrostriction of nanoparticles [ 19 , 20 ]. Despite the many studies on this problem [ 21 , 22 , 23 , 24 , 25 ], several questions still remain.…”

Section: Introductionmentioning

confidence: 99%

Appearance of a Solitary Wave Particle Concentration in Nanofluids under a Light Field

et al. 2021

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In this study, the nonlinear dynamics of nanoparticle concentration in a colloidal suspension (nanofluid) were theoretically studied under the action of a light field with constant intensity by considering concentration convection. The heat and nanoparticle transfer processes that occur in this case are associated with the phenomenon of thermal diffusion, which is considered to be positive in our work. Two exact analytical solutions of a nonlinear Burgers-Huxley-type equation were derived and investigated, one of which was presented in the form of a solitary concentration wave. These solutions were derived considering the dependence of the coefficients of thermal conductivity, viscosity, and absorption of radiation on the nanoparticle concentration in the nanofluid. Furthermore, an expression was obtained for the solitary wave velocity, which depends on the absorption coefficient and intensity of the light wave. Numerical estimates of the concentration wave velocity for a specific nanofluid—water/silver—are given. The results of this study can be useful in the creation of next-generation solar collectors.

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Section: Introductionmentioning

confidence: 99%

Appearance of a Solitary Wave Particle Concentration in Nanofluids under a Light Field

et al. 2021

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“…Электрострикционная сила, пропорциональная градиенту интенсивности, сила тяжести наночастиц, а также процесс их диффузии в жидкости изменяют в пространстве концентрацию частиц δC [17, 20 -22]. Наличие потока частиц приводит из-за эффекта Дюфура к пространственному изменению температуры раствора δT [16,20,22]. Уравнение диффузии (2) отличается от аналогичного уравнения, представленного в работе [16], наличием последнего слагаемого, обусловленного воздействием на наночастицы поля тяжести Земли.…”

Section: модель четырёхволнового взаимодействияunclassified

Spatial and temporal characteristics of a four-wave radiation converter with due regard for Earth's gravity field acting on nanoparticles dissolved in a transparent liquid

Savelyev

Remzov

2022

Computer Optics

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A theoretical analysis of the dynamics of the spatial spectrum of the object wave in a degenerate four-wave mixing in a transparent solution of nanoparticles in the classical scheme with counterpropagating pump waves is carried out. It is shown that when pump waves propagate orthogonally to the gravity force, a dip arises in the modulus of the spatial spectrum of the object wave, with its half-width nonmonotonically decreasing over time and increasing in the direction of gravity force with increasing radius of the nanoparticles. There is an optimal time over which the half-width of the dip in the direction of the gravity force reaches the lowest value. This time decreases monotonically with increasing nanoparticle radius, as well as with a decrease in the solution thickness.

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“…В последние годы проводятся активные исследования четырёхволновых взаимодействий в многокомпонентных, в частности, прозрачных средах [6][7][8][9][10][11][12][13][14]. В приближении плоских волн накачки четырёхволновые преобразователи на таких нелинейных средах за счёт явления электрострикции осуществляют фильтрацию высоких пространственных частот [15][16].…”

Section: Introductionunclassified

Influence of the pump wave rotation and divergence on the spatial selectivity of a four-wave radiation converter in a transparent two-component medium

Ivakhnik¹,

Savelyev²

2016

Computer Optics

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Temperature dynamics of a transparent nanoliquid acted on by a periodic light field

Cited by 10 publications

References 2 publications

Appearance of a Solitary Wave Particle Concentration in Nanofluids under a Light Field

Appearance of a Solitary Wave Particle Concentration in Nanofluids under a Light Field

Spatial and temporal characteristics of a four-wave radiation converter with due regard for Earth's gravity field acting on nanoparticles dissolved in a transparent liquid

Influence of the pump wave rotation and divergence on the spatial selectivity of a four-wave radiation converter in a transparent two-component medium

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