Design with modeling techniques

Wei, Ye; Pan, Yiqun; He, Ling‐Yun; Chen, Bingqian; Liu, Junjie; Gao, Jun; Wang, Yi; Yang, Yang

doi:10.1016/b978-0-12-816673-4.00008-0

Cited by 11 publications

(9 citation statements)

References 153 publications

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“…(3) energy equation: In these equations, v is velocity vector of water, t is flow time, ρ is the density of water, p is the pressure, μ is the dynamic viscosity of water, T is the temperature, C p is the heat capacity, and k is the thermal conductivity. The turbulence model used in this study is standard k − ε model [34][35][36]. The corresponding y + value is 50.88.…”

Section: Geometric Model For Thermal Simulationmentioning

confidence: 99%

Three-Dimensional Printing Conformal Cooling with Structural Lattices for Plastic Injection Molding

Shen,

Kanbur,

et al. 2024

FHMT

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The design of three-dimensional printing based conformal cooling channels (CCCs) in injection molding holds great significance. Compared to CCCs, conformal cooling (CC) cavity solutions show promise in delivering enhanced cooling performance for plastic products, although they have been underexplored. In this research, CC cavity is designed within the mold geometry, reinforced by body-centered cubic (BCC) lattice structures to enhance mechanical strength. Three distinct BCC lattice variations have been integrated into the CC cavity: the BCC structure, BCC with cubes, and BCC with pillars. The thermal performances of the BCC lattice-added CC cavity are assessed numerically after experimental validation. To provide feasible solutions from viewpoints of thermal performances, various BCC lattice structure thicknesses are analyzed in the range of 0.8-1.2 mm. Thermal simulation outcomes reveal that thicker lattice structures enhance mechanical strength but simultaneously lead to an increase in cooling time. Upon examining all the proposed CC cavity solutions supported by BCC, the cooling times range from 2.2 to 4 s, resulting in a reduction of 38.6% to 66.1% when compared to conventional straightdrilled channels. In contrast to CCCs, CC cavities have the potential to decrease the maximum temperature nonuniformity from 8.5 to 6 K. Nevertheless, the presence of lattice structures in CC cavity solutions results in an elevated pressure drop, reaching 2.8 MPa, whereas the results for CCCs remain below 2.1 MPa.

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Section: Geometric Model For Thermal Simulationmentioning

confidence: 99%

Three-Dimensional Printing Conformal Cooling with Structural Lattices for Plastic Injection Molding

Shen,

Kanbur,

et al. 2024

FHMT

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“…This model is based upon four assumptions: adsorbent surface is homogenous, sorbate molecules attach themselves to adsorbent at distinct active sites, only one molecule can be adsorbed to one active site and adsorbed molecules do not interact with each other. Langmuir model is usually fitted towards sorption that is chemical in nature [31]. Freundlich model is an empirical model, mostly having little physical meaning behind it.…”

Section: Isotherm Modelsmentioning

confidence: 99%

Current State of Knowledge About Plastics' Ability to Sorption

Worobiczuk,

Naumowicz

2024

Civil and Environmental Engineering Reports

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Plastic pollution is and will be a problem for humanity to deal with for decades to come. The main cause for concern is plastic debris of microsizes, that has been detected in many worrying locations, e.g. human body. Microplastic can carry many substances. It’s possible for many substances, including toxins, to accumulate on plastic surface. This review pertains to the compilation of the newest scientific information regarding plastic’s ability to sorption. The methodological approach as well as mathematical models used in studies pertaining to this topic have been demonstrated. The type of plastic, the matrix and state of microplastic sample have been described to be affecting sorption on plastic. Some problems with methodology in compiled sorption studies have been outlined. It was concluded that more research is needed to be done to fully grasp this topic.

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“…Therefore, the velocity inlet and the pressure outlet boundary conditions are set in this model. 86 By adopting the velocity magnitude from flow-MRI and pressure value from Reference 46, the through-plane phase-contrast data in the proximal ascending aorta are extracted and outlined in Figure 3. To maintain continuity with the given inlet boundary condition, a phase shift of about 0.35 s between the inlet velocity and outlet pressure is considered because of the length of the aorta.…”

Section: Patient-specific Velocity Profile and Pressure Boundary Cond...mentioning

confidence: 99%

“…Due to the physical nature of the blood flow through the aorta, a higher pressure/velocity can be observed in the proximal part of the aorta. Therefore, the velocity inlet and the pressure outlet boundary conditions are set in this model 86 . By adopting the velocity magnitude from flow‐MRI and pressure value from Reference 46, the through‐plane phase‐contrast data in the proximal ascending aorta are extracted and outlined in Figure 3.…”

Section: Materials and Geometry Of Fsi Model And Simulations Of Stanf...mentioning

confidence: 99%

Fluid–structure interaction study for biomechanics and risk factors in Stanford type A aortic dissection

Wang

Ghayesh

Kotousov

et al. 2023

Numer Methods Biomed Eng

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Aortic dissection is a life-threatening condition with a rising prevalence in the elderly population, possibly as a consequence of the increasing population life expectancy. Untreated aortic dissection can lead to myocardial infarction, aortic branch malperfusion or occlusion, rupture, aneurysm formation and death. This study aims to assess the potential of a biomechanical model in predicting the risks of a non-dilated thoracic aorta with Stanford type A dissection. To achieve this, a fully coupled fluid-structure interaction model was developed under realistic blood flow conditions. This model of the aorta was developed by considering threedimensional artery geometry, multiple artery layers, hyperelastic artery wall, in vivo-based physiological time-varying blood velocity profiles, and non-Newtonian blood behaviours. The results demonstrate that in a thoracic aorta with Stanford type A dissection, the wall shear stress (WSS) is significantly low in the ascending aorta and false lumen, leading to potential aortic dilation and thrombus formation.The results also reveal that the WSS is highly related to blood flow patterns. The aortic arch region near the brachiocephalic and left common carotid artery is prone to rupture, showing a good agreement with the clinical reports. The results have been translated into their potential clinical relevance by revealing the role of the stress state, WSS and flow characteristics as the main parameters affecting lesion progression, including rupture and aneurysm. The developed model can be tailored for patient-specific studies and utilised as a predictive tool to estimate aneurysm growth and initiation of wall rupture inside the human thoracic aorta.

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Design with modeling techniques

Cited by 11 publications

References 153 publications

Three-Dimensional Printing Conformal Cooling with Structural Lattices for Plastic Injection Molding

Three-Dimensional Printing Conformal Cooling with Structural Lattices for Plastic Injection Molding

Current State of Knowledge About Plastics' Ability to Sorption

Fluid–structure interaction study for biomechanics and risk factors in Stanford type A aortic dissection

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