Heat transfer and pressure drop characteristics of heat exchangers based on triply periodic minimal and periodic nodal surfaces

Iyer, Jaisree; Moore, Thomas; Nguyen, Du T.; Roy, Pratanu; Stolaroff, Joshuah K.

doi:10.1016/j.applthermaleng.2022.118192

Cited by 81 publications

(53 citation statements)

References 22 publications

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“…The Nu obtained with some of the novel TPMS internals designed in the present study, with constant temperature boundary condition and Pr=6.97 is higher than those presented in the literature such as Iyer et al [22] (supplementary information, Figure S6). The comparatively high…”

Section: Heat Transfer Performance Of Porous Tpmscontrasting

confidence: 64%

“…Nu in the present study with respect to Iyer et al [22] can be attributed to the difference in the dimensions of the computational domain, boundary conditions, and/or the topology of the TPMS.…”

Section: Heat Transfer Performance Of Porous Tpmscontrasting

confidence: 48%

“…The unit cell length of Iyer et al [22] in flow direction is 40 mm, which is double the length of the unit cell employed in the present study, also in the present study velocity inlet and pressure outlet boundary conditions are used at the inlet and outlet respectively, whereas Iyer et al [22] used periodic boundary condition at the inlet and the outlet. Moreover, in the present study, the geometric arrangement is cylindrical and the results can be directly compared with the flow in a cylindrical pipe with constant temperature boundary condition (Figure 8).…”

Section: Heat Transfer Performance Of Porous Tpmsmentioning

confidence: 89%

“…It can be observed from Figure 5 that the pressure drop is not depending on any irregularities in the column. There is no change in pressure drop in the radial direction within the TPMS structures once there is no local variation of the porosity, as is the case with Schwarz-D TPMS [22]. The complex and irregular anatomy of TPMS structures introduces tortuosity in the flow path.…”

Section: Estimation Of Pressure Dropmentioning

confidence: 99%

“…There are several studies available that analyzed the pressure drop and heat transfer across lattices and TPMS internal structures. For instance, Iyer et al [22] analyzed the pressure drop and heat transfer across a heat exchanger packed with standard TPMS internals such as gyroid, Schwarz-p, Schwarz-d, envious, etc. Their simulation study used water as a fluid and they reported a substantial increase in heat transfer rates with a slightly higher pressure drop.…”

Section: Introductionmentioning

confidence: 99%

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Novel Tpms Contactors Designed with Imprinted Porosity: Numerical Evaluation of Momentum and Energy Transport

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Section: Heat Transfer Performance Of Porous Tpmscontrasting

confidence: 64%

Section: Heat Transfer Performance Of Porous Tpmscontrasting

confidence: 48%

Section: Heat Transfer Performance Of Porous Tpmsmentioning

confidence: 89%

Section: Estimation Of Pressure Dropmentioning

confidence: 99%

Section: Introductionmentioning

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Novel Tpms Contactors Designed with Imprinted Porosity: Numerical Evaluation of Momentum and Energy Transport

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Effective Superelastic Domains of Schwarz Primitive Shape Memory Alloy Lattices Subjected to Cyclic Loading

Carcavilla

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2023

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This work investigates the evolution of effective phase transformation thresholds in superelastic shape memory alloy (SMA) lattice architectures subjected to cyclic loading. The investigation is carried out by means of finite element analysis and numerical homogenization methods, considering Schwarz primitive triply periodic minimal surface (TPMS) SMA unit cells subjected to periodic boundary conditions. The results are reported for relative densities between 10% and 50%. It is shown that, in all the cases considered, the loading surfaces governing both forward and reverse phase transformations have an ellipsoidal shape that can be reasonably well represented using an extended Hill's criterion that accounts for the influence of hydrostatic pressure. Moreover, by considering polynomial expressions of the coefficients of Hill's criterion in terms of martensite volume fraction and cumulated fraction, the evolution of the loading surfaces as a consequence of functional fatigue is reasonably well approximated. The results suggest that an extended Hill's criterion with variable coefficients can well be used to simulate effective phase transformation and functional fatigue in architected TPMS SMAs.

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Mechanical Properties of Highly Deformable Elastomeric Gyroids for Multifunctional Capacitors

Baker

Bosnjak

et al. 2023

Adv Eng Mater

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Triply periodic minimal surface lattices have mechanical properties that derive from the unit cell geometry and the base material. Through computation software like nTopology and Abaqus, these geometries are used to tune nonlinear stress–strain curves not readily achievable with solid materials alone and to change the compliance by two orders of magnitude compared to the constituent material. In this study, four elastomeric TPMS gyroids undergo large deformation compression and tension testing to investigate the impact of the structure's geometry on the mechanical properties. Among all the samples, the modulus at strain ε varies by over one order of magnitude (7.7–293.4 kPa from FEA under compression). These lattices are promising candidates for designing multifunctional systems that can perform multiple tasks simultaneously by leveraging the geometry's large surface area to volume ratio. For example, the architectural functionality of the lattice to bear loads and store mechanical energy along with the larger surface area for energy storage is combined. A compliant double‐gyroid capacitor that can simultaneously achieve three functions is demonstrated: load bearing, energy storage, and sensing.

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Heat transfer and pressure drop characteristics of heat exchangers based on triply periodic minimal and periodic nodal surfaces

Cited by 81 publications

References 22 publications

Novel Tpms Contactors Designed with Imprinted Porosity: Numerical Evaluation of Momentum and Energy Transport

Novel Tpms Contactors Designed with Imprinted Porosity: Numerical Evaluation of Momentum and Energy Transport

Effective Superelastic Domains of Schwarz Primitive Shape Memory Alloy Lattices Subjected to Cyclic Loading

Mechanical Properties of Highly Deformable Elastomeric Gyroids for Multifunctional Capacitors

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