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Труды сотрудников Института горного дела УрО РАН
Труды сотрудников Института органического синтеза УрО РАН
Труды сотрудников Института теплофизики УрО РАН
Труды сотрудников Института химии твердого тела УрО РАН
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Труды сотрудников ЦНБ УрО РАН
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 Найдено в других БД:Каталог книг и продолжающихся изданий (7)Сводный каталог иностранных периодических изданий, имеющихся в библиотеках УрО РАН (1)Труды Института высокотемпературной электрохимии УрО РАН (2)Труды Института истории и археологии УрО РАН (1)Труды сотрудников Института органического синтеза УрО РАН (2)Труды сотрудников Института химии твердого тела УрО РАН (1)Электронная энциклопедия «Дискурсология» (1)Библиометрия (10)
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Общее количество найденных документов : 10
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1.
Инвентарный номер: нет.
   
   S 89

    Vshivkov, S. A.
    Effect of molecular dimensions of components on phase transitions in solutions of oligomeric polyethers / S. A. Vshivkov, M. Z. Faizullin // Polymer Science. Series A. - 2009. - Vol.51, №9. - С. 974-978
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
POLYMER-SOLVENT INTERACTION -- POLYSTYRENE -- REGION
Аннотация: The molecular masses and intrinsic viscosities of a series of oligomeric poly(propylene glycols) have been studied by light scattering, analysis of chain ends, viscometry, and the cloud-point method. Phase diagrams are plotted and the Flory-Huggins thermodynamic interaction parameters and the second virial coefficients are calculated for oligomeric poly(propylene glycol)-n-alkane systems. The effects of the molecular dimensions of components on their mutual solubility and positions of boundary curves are determined. UCST decreases with an increase in the size of poly(propylene glycol) macromolecules and increases with an increase in the size of n-alkane mol

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2.
Инвентарный номер: нет.
   
   C 91

   
    Crystal nucleation rate isotherms in lennard-jones liquids [Electronic resource] / V. G. Baidakov, A. O. Tipeev, K. S. Bobrov, G. V. Ionov // Journal of Chemical Physics. - 2010. - Vol.132, №23. - P234505
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
MOLECULAR-DYNAMICS SIMULATION -- LENNARD-JONES FLUID -- NUCLEUS-LIQUID INTERFACE
Аннотация: We present the results of molecular dynamics simulations of the crystal nucleation rate in a supercooled Lennard-Jones liquid. The nucleation rate as a function of the pressure has been calculated by the method of determining the expectation time for liquid crystallization at temperatures higher than that of the triple point (T∗ = 0.865), close to the temperature of the terminal critical point of the metastable extension of the melting curve (T∗ = 0.55) and below this temperature (T∗ = 0.4). In computer experiments the nucleation rate varied from 1032 to 1035 s−1 m−3. The dimensions of critical nuclei and the pressure inside them, the surface free energy at a critical crystal nucleus-liquid interface, the height of the nucleation barrier, and the Zeldovich factor have been determined from the results of molecular dynamics simulations and their comparison with classical homogeneous nucleation theory. It is shown that the surface free energy at a curved crystal-liquid interface, as distinct from a flat interface, has also been determined at temperatures lower than the temperature of the terminal critical point of the melting curve and is a monotonically increasing function of the temperature

\\\\Expert2\\nbo\\Journal of Chemical Physics\\2010, v.132, p. 234505.pdf
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3.
Инвентарный номер: нет.
   
   M 43

    Maydanik, Yu. F.
    Compact cooler for electronics on the basis of a pulsating heat pipe / Yu. F. Maydanik, V. I. Dmitrin, V. G. Pastukhov // Applied Thermal Engineering. - 2009. - Vol.29, №17-18. - С. 3511-3517
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
PULSATING HEAT PIPE -- ELECTRONICS COOLING -- HEAT LOAD
Аннотация: The paper presents the results of developing and investigating a compact cooler for electronics made on the basis of a closed loop pulsating heat pipe (CLPHP). The cooler is made of a copper tube 5.6 m long with OD of 2 mm and ID of 1.2 mm in the form a 3D spiral containing 17 turns. The device is equipped with a light copper radiator with a finning area of 1670 cm2, which was blown by an axial fan located inside the spiral. The thermal interface of the cooler situated in the heating zone is made of a copper plate with a thermocontact surface measuring 40 × 35 mm, which was in thermal contact with all the turns of the device. The cooler overall dimensions are 105 × 100 × 60 mm, its mass is 350 g. The operation of the cooler has been investigated with water, methanol and R141b as working fluids at a uniform and concentrated supply of a heat load in different heating modes. A reliable operation of the device has been demonstrated in the range of heat loads from 5 to 250 W. A minimum thermal resistance “heat source–ambient air” equal to 0.32 °C/W was attained with water and methanol as working fluids at a uniform heat load of 250 W. With a heat load concentrated on a section of the thermal interface limited by an area of 1 cm2, a minimum value of thermal resistance equal to 0.62 °C/W was attained at a heat load of 125 W when methanol was used as a working fluid

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4.
Инвентарный номер: нет.
   
   O-66

   
    Optical studies of the initial stage of spontaneous boiling-up / A. L Gurashkin, A. D. Yampol'skiy, A. A. Starostin, P. V. Skripov // Technical Physics Letters . - 2013. - Vol.39, №8. - С. 751-754. - Библиогр.: с. 754 (11 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LIQUID BOILING-UP -- FIBER-OPTIC REFLECTOMETRY -- OPTICAL STUDIES
Аннотация: Spontaneous liquid boiling-up is studied using the technique of fiber-optic reflectometry. The speed of the experimental technique (10 MS/s) and small dimensions of the measurement area (9 μm) have opened new possibilities for monitoring the initial stage of boiling-up. When using a double-probe scheme, the fact of measuring the prognostic signal at different times by two sensitive elements of the optical probes was discovered. Based on the experimental results, a hypothesis was formulated regarding the local character of the appearance of the perturbation source generating the observed signal in a superheated liquid. An estimate was obtained for the rate of perturbation propagation in a wide variation range of the degree of liquid superheating

\\\\expert2\\NBO\\Technical Physics Letters (Письма в ЖТФ)\\2013, v. 39, N. 8, p.751.pdf
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5.
Инвентарный номер: нет.
   
   C 51

    Chernysheva, M. A.
    Peculiarities of heat transfer in a flat disk-shaped evaporator of a loop heat pipe [Electronic resource] / M. A. Chernysheva, Yu. F. Maydanik // International Journal of Heat and Mass Transfer. - 2016. - Vol. 92. - С. 1026-1033. - Bibliogr. : p. 1033 (16 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LOOP HEAT PIPES -- POROUS MATERIAL -- EVAPORATOR
Аннотация: Two models of a flat disk-shaped evaporator of a loop heat pipe have been developed for analyzing the effect of the convective component on heat transfer in a wick, and also on heat-exchange processes in an evaporation zone. Simulation data were obtained for two evaporators. The first evaporator was made entirely of copper, and the second had a body of stainless steel and a nickel wick. The geometrical dimensions of the evaporators were equal. The diameter of the heating zone was 30 mm. Calculations were made for heat fluxes from 2.8 ⋅ 104 to 4.2 ⋅ 105 W/m2. Water was used as a working fluid. An analysis of the results has shown that the contribution of the convective component to the overall heat transfer is small. The higher the thermal conductivity of the wick, the smaller the effect that the convection has on the temperature distribution in the evaporator.

\\\\expert2\\nbo\\International Journal of Heat and Mass Transfer\\2016, v. 92, p.1026-1033.pdf
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6.
Инвентарный номер: нет.
   
   S 89

    Vshivkov, S. A.
    Effect of molecular dimensions of components on phase transitions in solutions of oligomeric polyethers / S. A. Vshivkov, M. Z. Faizullin // Polymer Science. Series A. - 2009. - Vol.51, №9. - С. 974-978
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
POLYMER-SOLVENT INTERACTION -- POLYSTYRENE -- REGION
Аннотация: The molecular masses and intrinsic viscosities of a series of oligomeric poly(propylene glycols) have been studied by light scattering, analysis of chain ends, viscometry, and the cloud-point method. Phase diagrams are plotted and the Flory-Huggins thermodynamic interaction parameters and the second virial coefficients are calculated for oligomeric poly(propylene glycol)-n-alkane systems. The effects of the molecular dimensions of components on their mutual solubility and positions of boundary curves are determined. UCST decreases with an increase in the size of poly(propylene glycol) macromolecules and increases with an increase in the size of n-alkane mol

Найти похожие
7.
Инвентарный номер: нет.
   
   C 91

   
    Crystal nucleation rate isotherms in lennard-jones liquids [Electronic resource] / V. G. Baidakov, A. O. Tipeev, K. S. Bobrov, G. V. Ionov // Journal of Chemical Physics. - 2010. - Vol.132, №23. - P234505
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
MOLECULAR-DYNAMICS SIMULATION -- LENNARD-JONES FLUID -- NUCLEUS-LIQUID INTERFACE
Аннотация: We present the results of molecular dynamics simulations of the crystal nucleation rate in a supercooled Lennard-Jones liquid. The nucleation rate as a function of the pressure has been calculated by the method of determining the expectation time for liquid crystallization at temperatures higher than that of the triple point (T∗ = 0.865), close to the temperature of the terminal critical point of the metastable extension of the melting curve (T∗ = 0.55) and below this temperature (T∗ = 0.4). In computer experiments the nucleation rate varied from 1032 to 1035 s−1 m−3. The dimensions of critical nuclei and the pressure inside them, the surface free energy at a critical crystal nucleus-liquid interface, the height of the nucleation barrier, and the Zeldovich factor have been determined from the results of molecular dynamics simulations and their comparison with classical homogeneous nucleation theory. It is shown that the surface free energy at a curved crystal-liquid interface, as distinct from a flat interface, has also been determined at temperatures lower than the temperature of the terminal critical point of the melting curve and is a monotonically increasing function of the temperature

\\\\Expert2\\nbo\\Journal of Chemical Physics\\2010, v.132, p. 234505.pdf
Найти похожие
8.
Инвентарный номер: нет.
   
   M 43

    Maydanik, Yu. F.
    Compact cooler for electronics on the basis of a pulsating heat pipe / Yu. F. Maydanik, V. I. Dmitrin, V. G. Pastukhov // Applied Thermal Engineering. - 2009. - Vol.29, №17-18. - С. 3511-3517
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
PULSATING HEAT PIPE -- ELECTRONICS COOLING -- HEAT LOAD
Аннотация: The paper presents the results of developing and investigating a compact cooler for electronics made on the basis of a closed loop pulsating heat pipe (CLPHP). The cooler is made of a copper tube 5.6 m long with OD of 2 mm and ID of 1.2 mm in the form a 3D spiral containing 17 turns. The device is equipped with a light copper radiator with a finning area of 1670 cm2, which was blown by an axial fan located inside the spiral. The thermal interface of the cooler situated in the heating zone is made of a copper plate with a thermocontact surface measuring 40 × 35 mm, which was in thermal contact with all the turns of the device. The cooler overall dimensions are 105 × 100 × 60 mm, its mass is 350 g. The operation of the cooler has been investigated with water, methanol and R141b as working fluids at a uniform and concentrated supply of a heat load in different heating modes. A reliable operation of the device has been demonstrated in the range of heat loads from 5 to 250 W. A minimum thermal resistance “heat source–ambient air” equal to 0.32 °C/W was attained with water and methanol as working fluids at a uniform heat load of 250 W. With a heat load concentrated on a section of the thermal interface limited by an area of 1 cm2, a minimum value of thermal resistance equal to 0.62 °C/W was attained at a heat load of 125 W when methanol was used as a working fluid

Найти похожие
9.
Инвентарный номер: нет.
   
   O-66

   
    Optical studies of the initial stage of spontaneous boiling-up / A. L Gurashkin, A. D. Yampol'skiy, A. A. Starostin, P. V. Skripov // Technical Physics Letters . - 2013. - Vol.39, №8. - С. 751-754. - Библиогр.: с. 754 (11 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LIQUID BOILING-UP -- FIBER-OPTIC REFLECTOMETRY -- OPTICAL STUDIES
Аннотация: Spontaneous liquid boiling-up is studied using the technique of fiber-optic reflectometry. The speed of the experimental technique (10 MS/s) and small dimensions of the measurement area (9 μm) have opened new possibilities for monitoring the initial stage of boiling-up. When using a double-probe scheme, the fact of measuring the prognostic signal at different times by two sensitive elements of the optical probes was discovered. Based on the experimental results, a hypothesis was formulated regarding the local character of the appearance of the perturbation source generating the observed signal in a superheated liquid. An estimate was obtained for the rate of perturbation propagation in a wide variation range of the degree of liquid superheating

\\\\expert2\\NBO\\Technical Physics Letters (Письма в ЖТФ)\\2013, v. 39, N. 8, p.751.pdf
Найти похожие
10.
Инвентарный номер: нет.
   
   C 51

    Chernysheva, M. A.
    Peculiarities of heat transfer in a flat disk-shaped evaporator of a loop heat pipe [Electronic resource] / M. A. Chernysheva, Yu. F. Maydanik // International Journal of Heat and Mass Transfer. - 2016. - Vol. 92. - С. 1026-1033. - Bibliogr. : p. 1033 (16 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LOOP HEAT PIPES -- POROUS MATERIAL -- EVAPORATOR
Аннотация: Two models of a flat disk-shaped evaporator of a loop heat pipe have been developed for analyzing the effect of the convective component on heat transfer in a wick, and also on heat-exchange processes in an evaporation zone. Simulation data were obtained for two evaporators. The first evaporator was made entirely of copper, and the second had a body of stainless steel and a nickel wick. The geometrical dimensions of the evaporators were equal. The diameter of the heating zone was 30 mm. Calculations were made for heat fluxes from 2.8 ⋅ 104 to 4.2 ⋅ 105 W/m2. Water was used as a working fluid. An analysis of the results has shown that the contribution of the convective component to the overall heat transfer is small. The higher the thermal conductivity of the wick, the smaller the effect that the convection has on the temperature distribution in the evaporator.

\\\\expert2\\nbo\\International Journal of Heat and Mass Transfer\\2016, v. 92, p.1026-1033.pdf
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