Results 141 to 150 of about 240,911 (364)

An approach using the null space to implement Dirichlet and constraint boundary conditions into FEM [PDF]

open access: yesarXiv
A handy technique for the Finite Element Method (FEM) is presented that uses the null space for the implementation of Dirichlet and constraint boundary conditions. The focus of this method is to present an illustrative approach to modeling boundary constraints within FEM simulations for teaching.
arxiv  

Electro‐Thermal Response of Thin Film Heaters Based on Embedded Periodic Metallic Mesh

open access: yesAdvanced Theory and Simulations, EarlyView.
“This study systematically investigates the effect of periodic metallic mesh topology on electrical and electro‐thermal behaviours of thin thermal heaters. The derived closed‐form expressions capture the dependence of sheet resistance on design parameters, providing a crucial tool for rapidly exploring a vast design space and accelerating design and ...
Dimitrios Charaklias   +3 more
wiley   +1 more source

Optimised Protocol for Drying Aqueous Enzyme Solutions in Organic Solvents – Comparison of Free and Immobilised Candida antarctica Lipase B

open access: yesChemCatChem, Volume 15, Issue 1, January 9, 2023., 2023
Protocol for Drying Aqueous Enzyme Solution: An optimised protocol for drying of soluble lipases in organic solvents is presented, and the study highlights the importance of controlling water activity in reaction mixtures when lipase characteristics are investigated.
Helena D. Tjørnelund   +3 more
wiley   +1 more source

The Frequency‐Domain Lattice Boltzmann Method (FreqD‐LBM): A Versatile Tool to Predict the QCM Response Induced by Structured Samples

open access: yesAdvanced Theory and Simulations, EarlyView.
FreqD‐LBM simulates the oscillatory flow at the surface of a QCM‐D resonator in the presence of structured adsorbates. It derives shifts of frequency and bandwidth (equivalent to dissipation) on different overtones. Applications include rough surfaces, adsorbed rigid particles, adsorbed viscoelastic particles, spheres floating freely above the surface,
Diethelm Johannsmann   +5 more
wiley   +1 more source

Leakage of Metallic Ball Seat Valves with Anisotropic Surfaces

open access: yesChemical Engineering &Technology, Volume 46, Issue 1, Page 102-109, January 2023., 2023
A better understanding of the physics behind metallic sealing can be applied to develop better metallic valves and static seals. Most importantly, the influence of surface roughness on the leak tightness must be investigated. Most technical surfaces of practical interest are highly anisotropic.
Felix Fischer   +2 more
wiley   +1 more source

Elastic Relaxation of Coherent InGaN/GaN Interfaces at the Microwire LED Sidewall

open access: yesAdvanced Science, EarlyView.
Strain mapping and modeling reveal that the interfacial shear stresses arise toward the traction free sidewall of microscale light emitting diode (LED) wires while the two complementary strained InGaN and GaN layers in multiple quantum wells are relaxed to revert their bulk lattice parameters near the sidewall.
Jongil Kim   +5 more
wiley   +1 more source

Influence of High Pressure Drop Rates on Fatigue Crack Growth

open access: yesChemical Engineering &Technology, Volume 46, Issue 1, Page 45-52, January 2023., 2023
Hydraulic components are subjected to varying loads, limiting their lifetime. Accelerating fatigue studies through high‐frequency pulsation would decrease costs and time to market. However, the fluid‐structure interaction causes a time‐dependent fatigue load.
Lukas Michiels, Marcus Geimer
wiley   +1 more source

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