Numerical Investigation of a MEMS Thermal Actuator Performance by Modifying its Geometric Dimensions

Ionescu, Viorel

doi:10.1016/j.promfg.2019.02.290

Cited by 8 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For structural analysis, COMSOL3.5a is utilized in this work. For heat transfer, the conduction equation in the solid is considered [5] 𝜕𝜕𝐶𝐶 𝑝𝑝 ⋅ ∇𝑇𝑇 + ∇ ⋅ (−𝑘𝑘∇𝑇𝑇) = 0 (5) where 𝜕𝜕 is the density (kg/m 3 ), CP is specific heat capacity (J/kg•K), T is the temperature (K) and k is the thermal conductivity (W/m•K).…”

Section: Structural Analysismentioning

confidence: 99%

The Effect of Flow Channel Geometry on Thermomechanical Performance of Printed Circuit Heat Exchanger (PCHE)

Jiragoontansiri

Woravisuttsarakul

Sae-pueng

et al. 2022

Journal of Nuclear Engineering and Radiation Science

View full text Add to dashboard Cite

The carbon-free energy systems such as nuclear can benefit from compact and highly efficient heat exchanger technologies. The plate-type compact heat exchangers such as the Printed Circuit Heat Exchanger (PCHE) holds promise to fulfil these requirements. This work presents the thermal-hydraulic and structural analysis of PCHE for molten salt applications with thermal energy storage. In this study, three different typess of geometry are chosen for the analysis i.e., the zigzag channel type, the airfoil fin type, and the slotted fin type. For the working fluid, FLiBe (Li2BeF4) and Solar Salt (60% NaNO3 and 40% KNO3) are chosen for hot side and cold side respectively. Titanium grade 5 is chosen as the structural material. The study is conducted by Computational Fluid Dynamics (CFD) and Finite Element Method (FEM) analysis. The thermomechanical behavior including pressure drop, fluid temperature, velocity profile, stress, and deformation of the flow channel are considered in this work. From the results, the zigzag channel geometry gives the best thermal hydraulic performance in terms of heat transfer and pressure drop. The structural analysis shows that the stress intensity has an exponential growth with power generation level with zigzag channel geometry being the highest out of the three geometries. Overall, the zigzag channel PCHE is still the most suitable geometry for this application. However, zigzag channel geometry should be substituted with an alternative geometry for higher power applications e.g., airfoil-fin and slotted-fin geometries because they yield noticeably lower stress intensity.

show abstract

Section: Structural Analysismentioning

confidence: 99%

The Effect of Flow Channel Geometry on Thermomechanical Performance of Printed Circuit Heat Exchanger (PCHE)

Jiragoontansiri

Woravisuttsarakul

Sae-pueng

et al. 2022

Journal of Nuclear Engineering and Radiation Science

View full text Add to dashboard Cite

show abstract

“…The typical U-shaped structures of MEMS thermal actuators are used to solve the multi-physics fields coupling behavior in long-term performance, and the typical structures are shown in Figure 1 (Ionescu, 2019; Nasim et al., 2009; Wang et al., 2015). Previously, there have been some experimental and numerical studies on the behavior of multiple physical fields for the MEMS actuators (Alwan and Aluru, 2009; Azman et al., 2017; Chen et al., 2002).…”

Section: Development Of Creep Damage Model For Microelectromechanical...mentioning

confidence: 99%

Analysis of thermo-mechanical coupling damage behavior in long-term performance of microelectromechanical systems actuators

Jia-xing

2021

International Journal of Damage Mechanics

View full text Add to dashboard Cite

Effective numerical analysis is significant for the optimal design and reliability evaluation of MEMS, but the complexity of multi-physical field couplings and irreversible damage accumulation in long-term performance make the analysis difficult. In the present paper, the continuum damage mechanics method is used to develop a creep damage model and conduct long-term performance analysis for MEMS thermal actuators with coupled thermo-mechanical damage behavior. The developed damage model can make a connection between the material deterioration due to microstructure changes and the macroscopic responses (the change of thermo-mechanical performance or structure failure). The numerical simulations of coupled thermo-mechanical behavior in long-term performance are implemented using the finite element method, which is validated through comparison with previous literature. The numerical results demonstrate that the proposed damage model and numerical method can provide effective assessment in the long-term performance of MEMS thermal actuators.

show abstract

“…All the equations governing Solid Mechanics interface from Comsol Multipysics software are presented in detail in a previous study [18].…”

Section: Model Formulationmentioning

confidence: 99%

FEM Modeling of Delamination in AS4/PEEK Thermoplastic Composites under Mixed – Mode Bending Test

Ionescu

2020

mech

View full text Add to dashboard Cite

Interfacial failure by delamination in the unidirectional AS4/PEEK laminated composite was simulated through this paper with a finite element method (FEM) based model developed with Comsol Multiphysics software. The mixed – mode bending (MMB) test was investigated numerically here after a successful validation of the model by comparing with experimental measurements of the load –displacement curve provided in the literature. The maximum delamination length of the specimens modeled, the corresponding von Mises stress distributions and the damage evolution function have been evaluated for different ratios between mode II strain energy rate and total strain energy rate GII/GT = 20%, 50% and 80%.

show abstract

Numerical Investigation of a MEMS Thermal Actuator Performance by Modifying its Geometric Dimensions

Cited by 8 publications

References 20 publications

The Effect of Flow Channel Geometry on Thermomechanical Performance of Printed Circuit Heat Exchanger (PCHE)

The Effect of Flow Channel Geometry on Thermomechanical Performance of Printed Circuit Heat Exchanger (PCHE)

Analysis of thermo-mechanical coupling damage behavior in long-term performance of microelectromechanical systems actuators

FEM Modeling of Delamination in AS4/PEEK Thermoplastic Composites under Mixed – Mode Bending Test

Contact Info

Product

Resources

About