Experimental investigations and numerical modeling of point-fitted glass panes

2013 ◽  
pp. 396-404 ◽  
Keyword(s):  
Numerical Modeling ◽  
Experimental Investigations

Microscale Radiative Effects in Complex Microstructures of Iridescent Butterfly Wing Scales

1997 ◽  
Vol 489 ◽  
Author(s):  
Haruna Tada ◽  
Seth E. Mann ◽  
Ioannis N. Miaoulis ◽  
Peter Y. Wong
Keyword(s):  
Thin Film ◽  
Numerical Modeling ◽  
Experimental Investigations ◽  
Butterfly Wing ◽  
Radiative Effects ◽  
Cellular Microstructure ◽  
Cellular Development ◽  
Optical Phenomena ◽  
Thin Film Interference ◽  
Wing Scales

AbstractThe cellular microstructure of insect scales can be detailed intricately with threedimensional structures and multiple thin-film layers. In butterflies, iridescent scales can reflect bright colors through thin-film interference and other optical phenomena; the balance of radiation is absorbed for thermoregulatory purposes. Results of numerical and experimental investigations into the function, properties, and structure of these scales are presented. Of particular interest are the numerical modeling of the microscale radiative effects in the scales, determining the optical properties of the biological material, and the cellular development of thin-film structures.

scholarly journals Mechanical characterization and numerical modeling of laser-sintered TPE lattice structures

2021 ◽  
Author(s):  
Christina Kummert ◽  
Hans-Joachim Schmid ◽  
Lena Risse ◽  
Gunter Kullmer
Keyword(s):  
Numerical Modeling ◽  
Thermoplastic Elastomer ◽  
Experimental Investigations ◽  
Lattice Structures ◽  
Sintering Process ◽  
Compression Tests ◽  
Plastic Properties ◽  
Cell Parameters ◽  
Cyclic Compression

Abstract Additive Manufacturing provides the opportunity to produce tailored and complex structures economically. The use of lattice structures in combination with a thermoplastic elastomer enables the generation of structures with configurable properties by varying the cell parameters. Since there is only little knowledge about the producibility of lattice structures made of TPE in the laser sintering process and the resulting mechanical properties, different kinds of lattice structures are investigated within this work. The cell type, cell size and strut thickness of these structures are varied and analyzed. Within the experimental characterization of Dodecahedron-cell static and cyclic compression tests of sandwich structures are focused. The material exhibits hyperelastic and plastic properties and also the Mullins-Effect. For the later design of real TPE structures, the use of numerical methods helps to reduce time and costs. The preceding experimental investigations are used to develop a concept for the numerical modeling of TPE lattice structures. Graphic abstract

scholarly journals Rotating Detonation: History, Results, Problems

2020 ◽  
Vol 2020 (4) ◽  
pp. 48-60
Author(s):  
Anatoly A. Vasil’ev
Keyword(s):  
Numerical Modeling ◽  
Acoustic Waves ◽  
Rotation Velocity ◽  
Experimental Investigations ◽  
Detonation Waves ◽  
Reaction Products ◽  
Low Velocity ◽  
Acoustic Characteristics ◽  
Transverse Waves ◽  
Rotating Detonation

AbstractAmong of modern papers devoted to numerical modeling of rotated waves the greater part of papers are based on assumption that such wave propagates with velocity equals to the Chapman-Jouguet velocity of ideal detonation model with plane front. But the experimental velocities of rotated detonation waves, as a rule, are less (and even much less) the velocity of ideal Chapman-Jouguet detonation. Such regimes are named as low-velocity detonation or quasi-detonation and its characteristics are practically not investigated carefully. Moreover, similar to the spinning detonation, the strong connection of velocity of rotated transverse waves with the acoustic waves of reaction products was observed. So the new model with an allowance for the losses of impulse and energy must be used at numerical modeling of RDE and new experimental investigations of regimes with understated velocity must be carried out. In given paper some important aspects of rotated detonation waves and new experimental results are analyzed: the multifront system of rotated waves; correlation of rotation velocity of waves with acoustic characteristics of reaction products; streak-records trajectory of rotated waves on moving film; pressure and temperature profiles of rotating waves; velocity deficit and energy-release.

scholarly journals Numerical modeling and experimental investigations of thermal performance of reflective insulations

2012 ◽  
Vol 36 (2) ◽  
pp. 163-177 ◽  
Author(s):  
Hamed H Saber ◽  
Wahid Maref ◽  
Gordon Sherrer ◽  
Michael C Swinton
Keyword(s):  
Numerical Modeling ◽  
Thermal Performance ◽  
Experimental Investigations

Pulsed Plasma Thruster plumes - Experimental investigations and numerical modeling

2000 ◽  
Author(s):  
Nikos Gatsonis ◽  
Lawrence Byrne ◽  
Robert Eckman ◽  
Mike Gagne ◽  
Xuemin Yin ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Experimental Investigations ◽  
Pulsed Plasma ◽  
Pulsed Plasma Thruster ◽  
Plasma Thruster

STATE-OF-THE-ART REVIEW ON SEISMIC INDUCED POUNDING RESPONSE OF BRIDGE STRUCTURES

2013 ◽  
Vol 07 (03) ◽  
pp. 1350019 ◽  
Author(s):  
HONG HAO ◽  
KAIMING BI ◽  
NAWAWI CHOUW ◽  
WEI-XIN REN
Keyword(s):  
Numerical Simulation ◽  
Adverse Effect ◽  
Numerical Modeling ◽  
State Of The Art ◽  
Experimental Investigations ◽  
Bridge Structures ◽  
Mitigation Methods ◽  
Impact Models

Seismic induced pounding damage to bridge structures was repeatedly observed in many previous major earthquakes. To avoid this adverse effect, extensive research efforts have been made by many researchers. This paper presents a state-of-the-art review in this field. It includes a brief review of the numerical modeling of bridge structures and impact models, numerical simulation of pounding responses between different components of bridge structures, experimental investigations, and pounding mitigation methods.

scholarly journals CFD Modeling of Effluent Discharges: A Review of Past Numerical Studies

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 856 ◽  
Author(s):  
Abdolmajid Mohammadian ◽  
Hossein Kheirkhah Gildeh ◽  
Ioan Nistor
Keyword(s):  
Numerical Modeling ◽  
Near Field ◽  
Cfd Modeling ◽  
Experimental Investigations ◽  
Field Zone ◽  
Jet Mixing ◽  
The Past ◽  
Cfd Models ◽  
Effluent Discharge ◽  
The Impact

Effluent discharge mixing and dispersion have been studied for many decades. Studies began with experimental investigations of geometrical and concentration characteristics of the jets in the near-field zone. More robust experiments were performed using Laser-Induced Fluorescence (LIF) and Particle Image Velocimetry (PIV) systems starting in the 20th century, which led to more accurate measurement and analysis of jet behavior. The advancement of computing systems over the past two decades has led to the development of various numerical methods, which have been implemented in Computational Fluid Dynamics (CFD) codes to predict fluid motion and characteristics. Numerical modeling of mixing and dispersion is increasingly preferred over laboratory experiments of effluent discharges in both academia and industry. More computational resources and efficient numerical schemes have helped increase the popularity of using CFD models in jet and plume modeling. Numerous models have been developed over time, each with different capabilities to facilitate the investigation of all aspects of effluent discharges. Among these, Reynolds-averaged Navier-Stokes (RANS) and Large Eddy Simulations (LES) are at present the most popular CFD models employing effluent discharge modeling. This paper reviews state-of-the-art numerical modeling studies for different types and configurations of discharges, including positively and negatively buoyant discharges, which have mostly been completed over the past two decades. The numerical results of these studies are summarized and critically discussed in this review. Various aspects related to the impact of turbulence models, such as k-ε and Launder-Reece-Rodi (LRR) models, are reviewed herein. RANS and LES models are reviewed, and implications for the simulation of jet and plume mixing are discussed to develop a reference for future researchers performing numerical investigations on jet mixing and dispersion.

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