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アムステルダム 2025

PA Loudspeaker System Design Using Multiphysics Simulation

R. Balistreri [1],
[1] QSC Audio Products, LLC., Costa Mesa, CA, USA

This paper utilizes lumped circuits equivalent and pressure acoustics to simulate the behavior of a PA loudspeaker in order to improve its design. 詳細を見る

Single-Phase Modeling in Microchannel with Piranha Pin Fin

X. Yu [1], C. Woodcock [1], Y. Peles [2], J. Plawsky [1],
[1] Rensselaer Polytechnic Institute, Troy, NY, USA
[2] University of Central Florida, Orlando, FL, USA

Microchannel has shown potential to dissipate high heat flux in past years [1][2]. At the same time, liquid cooling attracts more and more attention from researchers for its favorable thermal properties and ability to cool down hot and keep acceptable system temperature [3][4][5]. This ... 詳細を見る

Simulation of the Cooling and Phase Change of a Melt-Cast Explosive

W. Sanhye [1], C. Dubois [1], P. Pelletier [2], I. Laroche [2],
[1] Department of Chemical Engineering, École Polytechnique de Montréal, Montréal, QC, Canada
[2] General Dynamics Ordnance and Tactical Systems-Canada Inc., Repentigny, QC, Canada

Introduction Numerical modeling of melt-casting is becoming a popular tool for the energetic materials and explosives industry. Compared to traditional metal casting, the cooling cycle for explosive melts is significantly longer because of their high Prandtl numbers [1]. Improving the ... 詳細を見る

Numerical Investigation of Heat Transfer in an Attic Duct Model

H. Liu [1], A. Fallahi [1], J. Kosny [1]
[1] Fraunhofer Center for Sustainable Energy Systems, Boston, MA, USA

Air ducts play an important role in the energy efficiency of residential homes across the country. While transporting the conditioned air from the HVAC system to the conditioned space, 30-40% of the thermal energy can be lost due to conduction [1]. The loss of thermal energy can reduce ... 詳細を見る

Microscale Simulations of Catalyst Deactivation During Gas-Phase Upgrading of Biomass Pyrolysis Vapors

P. N. Ciesielski [1], D. Robichaud [2], B. Donohoe [1], M. Nimlos [2],
[1] Biosciences Center, National Renewable Energy Laboratory, Golden, CO, USA
[2] National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO, USA

Catalytic fast pyrolysis is a process by which biomass may be converted into liquid hydrocarbon transportation fuels and chemical co-products that are alternative to their petroleum-derived counterparts. Chemical compounds in raw pyrolysis vapor have high oxygen content and therefore ... 詳細を見る

PVDF Piezoelectric Nanofibers as Hair Cell Substitutes: A Feasibility Study

C. R. Pérez [1], J. J. Santiago-Avilés [2],
[1] Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, USA
[2] Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, USA

Sensorineural hearing loss is the most common sensory deficit in the world, and within this category damage or loss of the primary sensory cells of the inner ear, known as hair cells is the most common cause [1]. Partial hearing loss is addressed by the use of hearing aids, electronic ... 詳細を見る

Simulation of a Dual Axis MEMS Seismometer For Building Monitoring System

M. A. Shah [1], F. Iqbal [1], B. L. Lee [1],
[1] Korea University of Technology and Education, Cheonan, Chungcheong, South Korea

A dual axis MEMS seismometer targeted for building monitoring system has been simulated for a full scale of ±5g acceleration. The design uses the capacitive effect for vibration sensing. This comb drive capacitive MEMS seismometer consists of 8 springs with two proof masses. The device ... 詳細を見る

Solar Dryer Exergetic and Energetic Efficiency Analysis

L. Romero-Salazar [1], H. Lucatero-Villaseñor [1], E. Ruiz-Baltazar [1], M. Mayorga [2], J. C. Arteaga-Arcos [3],
[1] Laboratorio de Nanotermodinámica, Facultad de Ciencias, Universidad Autónoma del Estado de México, Toluca, DF, Mexico
[2] Laboratorio de Microfluidez y Nanofluidos, Facultad de Ciencias, Universidad Autónoma del Estado de México, Toluca, DF, Mexico
[3] Laboratorio Micromecánica, Facultad de Ciencias, Universidad Autónoma del Estado de México, Toluca, DF, Mexico

A drying chamber for dehydration purposes is simulated; we model a chamber chimney system coupled to a solar collector as the heat source. Using both, the Heat Transfer Module and CFD Module of COMSOL Multiphysics® software in a 2D geometry we simulate the velocity and temperature field ... 詳細を見る

Solution of Poroelastic Equations with Different Base Variables Using Equation-based Modeling

M. H. Akanda [1], Y. Cao [1], A. J. Meir [1],
[1] Department of Mathematics & Statistics, Auburn University, Auburn, AL, USA

Poroelasticity equations describe the interaction between fluid flow and solids deformation within a porous medium. Modeling of poroelasticity is coupling between elastic deformation of porous materials and Darcy’s law. Poroelasticity has numerous real world applications such as in ... 詳細を見る

A Lesson in Cartilage Therapy: Do Chondrocytes Utilize Mechanical Energy from Exercise for Cell Maintenance and Growth?

A. Miller [1], H. Viljoen [1], A. Chama [2], T. Louw [2],
[1] Department of Chemical and Biomolecular Engineering, University of Nebraska - Lincoln, Lincoln, NE, USA
[2] Department of Chemical Engineering, Stellenbosch University, Stellenbosch, South Africa

Using COMSOL Multiphysics® Acoustics Module: Chondrocytes modeled attached to a plane (to mimic in vivo constraints) are shown to resonate near 5MHz. At resonance, the mechanical energy density in the nucleus is two times higher than in the cytoplasm. Impact exercise is modeled as ... 詳細を見る

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