Numerical investigation on melting behaviour of phase change materials/metal foam composites under hypergravity conditions

Ding, Chen; Zhang, Cheng; Ma, Liang; Sharma, Ashutosh

doi:10.1016/j.applthermaleng.2022.118153

Cited by 31 publications

(4 citation statements)

References 46 publications

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“…In recent years, metal porous materials have been used due to their unique properties and the combination of structural and functional material properties [1][2][3]. Widely used in biological, medical [4][5][6], aerospace [7] and industrial applications [8][9][10][11][12], the high demand for green materials in various fields has driven the development of metal foam. Porous metal foam structures with high specific surface area, high permeability properties and high mechanical strength are being explored as an alternative material to conventional heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Heat Transfer in Electronic Radiator Filled with Metal Foam

et al. 2023

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The performance of an electronic radiator filled with metal foam with a porosity of 96% was studied. The effect of the factors including the flow rates, the pores per linear inch (PPI) and the numbers of fins was analyzed. The results show that the electronic radiator with metal foam reflects a stronger ability of the heat transfer compared to the electronic radiator without metal foam. With the increase in the flow rate between 10 L/h and 60 L/h, the heat transfer coefficient of both of the two electronic radiators will be improved, but it is also dependent on the number of fins. In this study, we find that the heat transfer coefficient first increases and then decreases with the number of fins. The optimum number is three. As for the effect of the PPI, the higher the PPI, the larger the heat transfer coefficient, while the pressure drop always increases with the flow rates’ increase, the pores per linear inch (PPI) and the numbers of fins.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Heat Transfer in Electronic Radiator Filled with Metal Foam

et al. 2023

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“…Hypergravity pertains to gravitational forces that surpass Earth’s standard gravitational acceleration of 1 g (≈9.81 m normals−2) [26]. Biological organisms and aerospace equipment frequently confront an array of extreme conditions, rendering them susceptible to recurrent exposures in hypergravity environments.…”

Section: Introductionmentioning

confidence: 99%

Equivalent in-plane elastic moduli of honeycomb materials under hypergravity conditions

Wang,

Lü

2023

Proc. R. Soc. A.

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Honeycomb materials frequently encounter hypergravity conditions in both aerospace and biological contexts during phases such as launch, reentry or under centrifugal motion. The significant body force engendered by hypergravity induces alterations in the microstructure of honeycomb materials, which in turn, influences their macroscopic mechanical behaviour. Leveraging the stiffness of the beam element as a pivotal variable, we successfully derived the equivalent moduli of the honeycomb material under hypergravity conditions. We further proposed the concept of a ‘hypergravity factor’, elucidating that the density of the base material, the dimensions of honeycomb cells and the magnitude of the hypergravity contribute to amplifying hypergravity effects. The results, numerically validated through finite-element simulations, could be reduced to the case that neglects body force. The critical buckling load of the honeycomb material under hypergravity can be assessed by setting the derived moduli to zero. In the presence of hypergravity, a honeycomb material undergoes a transition into a gradient material along the hypergravity direction, thereby exacerbating anisotropy. This phenomenon is theoretically expected to occur in virtually all porous materials. The analytical framework adopted, which employs beam stiffness as an intermediary variable, facilitates the extension of these results to honeycomb materials which encompass beam elements with functional gradients or varying cross-sectional morphologies.

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“…There are many ways to study the influence of temperature on material deformation. One of them is the multi-physical field of mechanical-thermal coupling by FEM method to solve material deformation [ 18 , 19 , 20 ]. For example, the thermal coupling elastic large deformation model of multi-layer functionally graded material curved beams with arbitrary undeformed configuration is established, which solves the difficulty of determining the neutral axis position of the beam in the classical analysis.…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Thermal-Mechanical Coupling Numerical Model to Solve the Deformation and Thermal Diffusion of Plates

2022

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Elastic materials include metal plates, rubber, foam, airbags and so on, which have a good buffer effect, toughness and strong recovery ability. In this paper, the deformation and thermal diffusion of 2D and 3D thin plates are studied. Two models are established for the deformation of 2D thin plates. The bending deformation equation of rectangular and circular plates is derived, and the semi-analytical solution of the deflection function w(x,y) is found through the Fourier series approximation in the polar coordinate. The consistencies of the numerical solution and the theoretical solution are verified by numerical method. Then, we find that the factors affecting the deformation are related to the Young’s modulus, load, plate length and deformation factor α of the material. In a separate temperature physics field, we establish a heat conduction model of 2D graphene film. Three numerical schemes of the transient heat conduction equation of FDM-FEM are given. In contrast, this paper uses the implicit Euler method to discrete the time term. Furthermore, we compared the difference between the adiabatic condition and the convection condition by the graphical method and the curve trend. The results show that the temperature near the adiabatic boundary is higher. Finally, we proposed a 3D dynamic thermal–mechanical coupling model (3D-DTMCM) that has been established. A laser heating monocrystalline silicon sheet with periodic motion formula is given. The temperature radiation of the laser heat source has Gaussian distribution characteristics. Our proposed model can dynamically determine Young’s modulus with a variable temperature. The numerical results show that the higher the temperature is, the higher the strain energy density of the plate is. In addition, the deformation amplitude of the plates in the coupling field is larger than that in the single mechanical field. Finally, we also discussed the stress field distribution of mixed cracks under high temperature and high load. Our research provides theoretical support for the deformation of different plates, and also reflects the value of the coupled model in practical applications.

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Numerical investigation on melting behaviour of phase change materials/metal foam composites under hypergravity conditions

Cited by 31 publications

References 46 publications

Analysis of the Heat Transfer in Electronic Radiator Filled with Metal Foam

Analysis of the Heat Transfer in Electronic Radiator Filled with Metal Foam

Equivalent in-plane elastic moduli of honeycomb materials under hypergravity conditions

A Dynamic Thermal-Mechanical Coupling Numerical Model to Solve the Deformation and Thermal Diffusion of Plates

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