Experimental models to estimate supercooling behavior of ZrO2 nanofluid phase change materials

Aslani, Hoda; Moghiman, Mohammad

doi:10.1140/epjp/i2019-12969-2

Cited by 4 publications

(3 citation statements)

References 38 publications

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“…Many activities or occurrences around us can be used as learning tools in science education (Abdullah et al, 2014;Abdullah et al, 2020;Aleksandrov et al, 2013;Aslani & Moghiman, 2019;Fallahnezhad & Reza Nazif, 2019;Nelson et al, 2020;Wibowo et al, 2016;Will et al, 2017). Contextual approaches need to be involved instead of textual practices in conducting science learning to become more understandable and fun, especially in physics subject (Dale et al, 2019;Jelicic et al, 2022;Sokolowski, 2021).…”

Section: Introductionmentioning

confidence: 99%

Derivation of Newton's law of cooling and heating: Heating the water then cooling it down naturally to the room temperature

Wibowo

Ulya

Farizi

et al. 2023

Momentum: Physics Education Journal

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A simple experiment has been conducted to study Newton's law of cooling and heating by observing the nature of the increasing and decreasing water temperature by utilizing a data logger, a thermocouple, a pan, a hot plate, and water. The uncovered pan contained water which was subsequently heated on a hot plate. The water was heated at ambient temperature and normal atmospheric pressure to see that the temperature rose exponentially. Conversely, the temperature of hot water decreased exponentially when the heat source was switched off. The model for increasing and decreasing water temperature is following the Newton's law of cooling and heating. It was proven that the experimental data highly fit theoretical models. The temperature increment constant (ka) and the temperature decrement constant (kd) determined the rate of temperature changes. Low values of ka and kd led to the slow change in the temperature, either the increase or the decrease in the water temperature and vice versa. The ka > kd was observed for all given conditions so that the increasing rate in the water temperature was faster than its decrease. The result of this study can be applied as an example of contextual learning of physics for university students.

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Section: Introductionmentioning

confidence: 99%

Derivation of Newton's law of cooling and heating: Heating the water then cooling it down naturally to the room temperature

Wibowo

Ulya

Farizi

et al. 2023

Momentum: Physics Education Journal

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“…In the last few decades, the research on phase change materials (PCMs)has become an interesting field due to their important energy storage density and inherent capacity toyield heat energy ata constant temperature [1]. Liquid-solid phase change processes exist in several technical applications likesolar energy storage [2][3][4][5][6][7][8][9][10][11][12], biological fields during the freezing of tissues [13,14], building applications [15][16][17][18][19][20] to improve the energy efficiency of buildings, hydrogen reactors [21][22][23][24][25][26], ventilation systems [27,28], refrigeration systems [29],and many other environmental engineering processes [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

“…Different analytical and numerical methods have been employed to resolve the phase change problems and to account for the moving of the solid-liquid front. Analytical approaches such as Neumann's method and heat balance integral method [35][36][37][38][39] provide a mathematical solution to the physical processes that involve the moving boundary but are restrictedto onedimensional caseswith simple initial and boundary conditions. The analytical solutions do not exist in most of the realistic cases as they havehighly non-linear multidimensional nature and moving boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

New model for PCM melting and solidification processes simulation

et al. 2021

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The numerical instabilities associated with solidification and melting processes are mainly due to the transient temperature field in liquid and solid phases and characteristics of the front phase. To prevent these instabilities, a new model for the liquid fraction is proposed in the present article and is based on the analytical Heaviside step function's approximation. The efficiency of the current model is well verified with the numerical simulation of one-and two-dimensional heat conduction problems within regular geometries and is further noticed that the results agree well with the analytical solutions. It is also noted that the proposed model provides more accurate results when compared to the Meshless Local Petrov-Galerkin (MLPG) method and is competent to resolve the above said instabilities.To examine its accuracy for any 2D-arbitrarily-shaped enclosures, a new solidification problem within a more complex geometry was proposed. This problem can be used as a benchmark test for solidification/melting problems. The proposed model was applied to solve this problem and accurate results are obtained. Hence, the previously reported approaches,which are not even able to ensure discrete conservation at the interface, may be replaced by the proposed interface model.

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Clathrate hydrate for phase change cold storage: Simulation advances and potential applications

Yuan

Xia

Wang

et al. 2022

Journal of Energy Storage

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Experimental models to estimate supercooling behavior of ZrO2 nanofluid phase change materials

Cited by 4 publications

References 38 publications

Derivation of Newton's law of cooling and heating: Heating the water then cooling it down naturally to the room temperature

Derivation of Newton's law of cooling and heating: Heating the water then cooling it down naturally to the room temperature

New model for PCM melting and solidification processes simulation

Clathrate hydrate for phase change cold storage: Simulation advances and potential applications

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