scholarly journals Analysis of Restitution Coefficient and Hardness of CO2-Assisted Polymer Compression Products

2021 ◽  
Vol 54 (8) ◽  
pp. 463-466
Author(s):  
Takafumi Aizawa
Keyword(s):  
Restitution Coefficient

scholarly journals Self-diffusion scalings in dense granular flows

Soft Matter ◽  
2021 ◽  
Author(s):  
Riccardo Artoni ◽  
Michele Larcher ◽  
James T. Jenkins ◽  
Patrick Richard
Keyword(s):  
Shear Rate ◽  
Solid Fraction ◽  
Granular Flows ◽  
The Self ◽  
Granular Temperature ◽  
Restitution Coefficient ◽  
Self Diffusion ◽  
Diffusivity Tensor ◽  
Dense Granular Flows

The self-diffusivity tensor in homogeneously sheared dense granular flows is anisotropic. We show how its components depend on solid fraction, restitution coefficient, shear rate, and granular temperature.

The bouncing ball and the Grünwald-Letnikov definition of fractional derivative

2021 ◽  
Vol 24 (4) ◽  
pp. 1003-1014
Author(s):  
J. A. Tenreiro Machado
Keyword(s):  
Fractional Calculus ◽  
Fractional Derivative ◽  
Fractional Order ◽  
Restitution Coefficient ◽  
Classical Physics ◽  
Bouncing Ball ◽  
Mechanical Experiment ◽  
Fractional Models ◽  
Definition Of

Abstract This paper proposes a conceptual experiment embedding the model of a bouncing ball and the Grünwald-Letnikov (GL) formulation for derivative of fractional order. The impacts of the ball with the surface are modeled by means of a restitution coefficient related to the coefficients of the GL fractional derivative. The results are straightforward to interpret under the light of the classical physics. The mechanical experiment leads to a physical perspective and allows a straightforward visualization. This strategy provides not only a motivational introduction to students of the fractional calculus, but also triggers possible discussion with regard to the use of fractional models in mechanics.

scholarly journals Estimation of the restitution coefficient by strain measurement

2015 ◽  
Vol 94 ◽  
pp. 01006
Author(s):  
Naoya Nishimura ◽  
Katsuhiko Murase ◽  
Takeru Watanabe ◽  
Keisuke Niimi ◽  
and Makoto Fukuhara
Keyword(s):  
Strain Measurement ◽  
Restitution Coefficient

Investigations of the Restitution Coefficient of Granules

2008 ◽  
pp. 235-241 ◽  
Author(s):  
P. Müller ◽  
S. Antonyuk ◽  
J. Tomas ◽  
S. Heinrich
Keyword(s):  
Restitution Coefficient

Calculation of Transient Flow in Circulating Fluidized Beds With Straight and Double Abrupt Outlet Configuration: Relation With the Inelasticity of the Particle-Particle Collisions

2001 ◽  
Author(s):  
Juray De Wilde ◽  
Jan Vierendeels ◽  
Geraldine J. Heynderickx ◽  
Erik Dick ◽  
Guy B. Marin
Keyword(s):  
Kinetic Theory ◽  
Gravity Waves ◽  
Granular Flow ◽  
Fluidized Beds ◽  
Transient Flow ◽  
Industrial Scale ◽  
Circulating Fluidized Beds ◽  
Restitution Coefficient ◽  
Particle Collisions ◽  
The Stability

Abstract Gas-solid flow in industrial scale Circulating Fluidized Beds (CFB’s) is calculated in 3D using the Eulerian-Eulerian approach and the Kinetic Theory of Granular Flow (KTGF). Two outlet configurations are used: a straight top outlet and a double abrupt T-outlet. The effect of the value of the restitution coefficient for particle-particle collisions on the stability of the flow is investigated. Oscillations appearing in CFB’s, are shown to be gravity waves.

Two-fluid modeling of a wet spouted fluidized bed with wet restitution coefficient model

2020 ◽  
Vol 364 ◽  
pp. 363-372 ◽  
Author(s):  
Hanbin Zhong ◽  
Yaning Zhang ◽  
Qingang Xiong ◽  
Juntao Zhang ◽  
Yuqin Zhu ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Restitution Coefficient ◽  
Fluid Modeling ◽  
Two Fluid

scholarly journals Impact Load of Welds After Micro-Jet Cooling / Dynamiczne Obciążenie Spoin Chłodzonych Mikrojetowo

2015 ◽  
Vol 60 (4) ◽  
pp. 2525-2528 ◽  
Author(s):  
D. Hadryś
Keyword(s):  
Plastic Strain ◽  
Impact Load ◽  
Restitution Coefficient ◽  
Plastic Properties ◽  
Jet Cooling ◽  
Several Variables ◽  
Innovative Method ◽  
Metal Deposit ◽  
Car Crash ◽  
Forced Cooling

Micro-jet cooling is an innovative method of forced cooling. It could be used to cooling after welding immediately. It allows to obtain welds with better properties in comparison to ordinary welding method. Favourable structure of weld metal deposit (WMD) with higher content of acicular ferrite (AF) could be obtained. These properties can be controlled by several variables (e. g. type of cooling gas, number of jets). Plastic properties are particularly important in case of impact load. This type of strength is very dangerous for the structure and for safety of users (ex. car body during car crash). This article presents the influence of the cooling gas and the number of jets on plastic properties of the weld joint for impact load. It is described by restitution coefficient and plastic strain.

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