Natural convective flow and heat transfer of Nano-Encapsulated Phase Change Materials (NEPCMs) in a cavity

Ghalambaz, Mohammad; Chamkha, Ali J.; Wen, Dongsheng

doi:10.1016/j.ijheatmasstransfer.2019.04.037

Cited by 327 publications

(111 citation statements)

References 58 publications

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“…Therefore, from this study, it can be inferred that with a little increment and decrement of

M,

β_{1}

λ

β_{2}

italicPr

E

δ

σ

, and

S c

, the activation energy can be improved along with binary chemical reaction on an electrically conducting Maxwell fluid with the Cattaneo–Christov heat flux model. It is expected that this model has novel characteristics that will motivate future investigational efforts 53‐56 …”

Section: Discussionmentioning

confidence: 99%

MHD rotating flow of a Maxwell fluid with Arrhenius activation energy and non‐Fourier heat flux model

Ramaiah¹,

Surekha

Gangadhar

et al. 2020

Heat Trans

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In the present work, the effects of the transfer of heat, as well as the mass phenomenon of a Maxwell fluid in revolving flow over a unidirectional stretching surface are discussed. The result of the magnetic field within the boundary layer is considered. In the energy equation, the heat flux model of non-Fourier Cattaneo-Christov is employed. The customized Arrhenius function for energy activation is used. By using the transformation strategy, nondimensional expressions are achieved. To predict the highlights of the current effort, the result of the emerging nonlinear differential structure is calculated with the aid of the shooting procedure as well as the Runge-Kutta Fehlberg procedure. The influence of velocity and temperature along with concentration profiles for various physical parameters is analyzed. The involvement of fluid relaxation and thermal retardation phenomena is unequivocally mentioned.The evolution of heat transfer, as well as the rate of mass in the flow of fluids, is illustrated by the use of graphs in addition to tables. Furthermore, the current effort is confirmed by examination with previously published results, which establishes a strategy for the execution of a numerical approach. It is observed that the concentration of a solute in dual combination is relative to both rotation parameters along with activation energy. Besides this, a diminishing pattern in the distribution of temperature is described within the existence of the Cattaneo-Christov flux law by association with the rate of heat transfer because of Fourier's law. The present investigation can be applied in numerous engineering and technical procedures including the development of thin sheets, modeling of plastic sheets, in the lubrication system industry related to polymers, compression, and injection shaping in the area of chemical production and bimolecular reactions. Inspired by those applications, the present work is undertaken. K E Y W O R D S Arrhenius activation energy, Cattaneo-Christov heat flux model, chemical reaction, Maxwell fluid, MHD, rotating frame

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“…Therefore, from this study, it can be inferred that with a little increment and decrement of

M,

β_{1}

λ

β_{2}

italicPr

E

δ

σ

, and

S c

Section: Discussionmentioning

confidence: 99%

MHD rotating flow of a Maxwell fluid with Arrhenius activation energy and non‐Fourier heat flux model

Ramaiah¹,

Surekha

Gangadhar

et al. 2020

Heat Trans

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“…Chamkha 20 discussed the mixed convection flow in a vertical channel with symmetric and asymmetric wall conditions. Recently, Ghalambaz et al [21][22][23] adopting the nanofluid presented the flow and heat transfer in cavity. Umavathi et al [24][25][26] also worked on double diffusive convective transport.…”

Section: Introductionmentioning

confidence: 99%

Triple diffusive mixed convection flow in a duct using convective boundary conditions

Umavathi

Ali

Patil

2020

Math Methods in App Sciences

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The motivation of the current article is to explore a numerical investigation on steady triply diffusive convection in a vertical channel. Heat is exchanged from the external fluid with the plates. The reference temperature is taken as equal and also as different for the external fluid. Solutions in the absence of viscous dissipation and buoyancy forces are also obtained as special cases. General solutions including the effects of viscous dissipation and buoyancy forces are obtained analytically using the method of perturbation. The analytical solutions can be used only if the Brinkman number is small. Hence to know the flow properties for all values of Brinkman number, we resort to numerical solutions. The effects of thermal Grashof number, solutal Grashof number, and the chemical reaction parameter on the flow field are evaluated numerically. The obtained results are validated against previously published results for special case of the problems.

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“…Therefore, several heat-transfer enhancement techniques have been introduced and applied to improve the thermal response of PCM-based TES systems [ 24 , 25 ]. These techniques include incorporating fins and extended surfaces [ 26 , 27 , 28 , 29 ], modifying the geometry [ 30 , 31 , 32 ], embedding porous structures [ 33 , 34 , 35 , 36 , 37 ], composing thermally high conducting particles [ 38 , 39 , 40 , 41 ], using multiple PCMs [ 42 , 43 ], nano-encapsulation [ 44 , 45 , 46 ], and using the combinations of different methods [ 43 , 47 ]. Among them, incorporating with fins is a particularly attractive option from both economic and engineering perspectives.…”

Section: Introductionmentioning

confidence: 99%

Phase Change Process in a Zigzag Plate Latent Heat Storage System during Melting and Solidification

et al. 2020

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Applying a well-performing heat exchanger is an efficient way to fortify the relatively low thermal response of phase-change materials (PCMs), which have broad application prospects in the fields of thermal management and energy storage. In this study, an improved PCM melting and solidification in corrugated (zigzag) plate heat exchanger are numerically examined compared with smooth (flat) plate heat exchanger in both horizontal and vertical positions. The effects of the channel width (0.5 W, W, and 2 W) and the airflow temperature (318 K, 323 K, and 328 K) are exclusively studied and reported. The results reveal the much better performance of the horizontal corrugated configuration compared with the smooth channel during both melting and solidification modes. It is found that the melting rate is about 8% faster, and the average temperature is 4 K higher in the corrugated region compared with the smooth region because of the large heat-exchange surface area, which facilitates higher rates of heat transfer into the PCM channel. In addition to the higher performance, a more compact unit can be achieved using the corrugated system. Moreover, applying the half-width PCM channel accelerates the melting rate by eight times compared to the double-width channel. Meanwhile, applying thicker channels provides faster solidification rates. The melting rate is proportional to the airflow temperature. The PCM melts within 274 s when the airflow temperature is 328 K. However, the melting time increases to 460 s for the airflow temperature of 308 K. Moreover, the PCM solidifies in 250 s and 405 s in the cases of 318 K and 328 K airflow temperatures, respectively.

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Natural convective flow and heat transfer of Nano-Encapsulated Phase Change Materials (NEPCMs) in a cavity

Abstract: This is a repository copy of Natural convective flow and heat transfer of Nano-Encapsulated Phase Change Materials (NEPCMs) in a cavity.

Cited by 327 publications

References 58 publications

MHD rotating flow of a Maxwell fluid with Arrhenius activation energy and non‐Fourier heat flux model

MHD rotating flow of a Maxwell fluid with Arrhenius activation energy and non‐Fourier heat flux model

Triple diffusive mixed convection flow in a duct using convective boundary conditions

Phase Change Process in a Zigzag Plate Latent Heat Storage System during Melting and Solidification

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