نتایج جستجو برای: dimensionless torque coefficient

تعداد نتایج: 195854  

Journal: :Appl. Soft Comput. 2015
Isa Ebtehaj Hossein Bonakdari Amir Hossein Zaji Hamed Azimi Ali Sharifi

In this study, Gene expression programming (GEP) is employed as a new method for estimating the side weir discharge coefficient. The accuracy of existing equations in evaluating the side weir discharge coefficient is first examined. Afterward, taking into consideration the dimensionless parameters that affect the estimation of this parameter and sensitivity analysis, five different models are p...

2003
A Endemaño J Y Fourniols

System level simulation results of a planar electrostatic micromotor, based on analytical models of the static and dynamic torque behaviours, are presented. A planar variable capacitance (VC) electrostatic micromotor designed, fabricated and tested at LAAS (Toulouse) in 1995 is simulated using the high level language VHDL–AMS (VHSIC (very high speed integrated circuits) hardware description lan...

Journal: :Journal of biomechanics 1999
A Desplantez C Cornu F Goubel

The purpose of this study was to determine viscous properties of human muscle during plantarflexion efforts. Experiments were performed on 17 subjects with an ankle ergometer allowing sinusoidal oscillations during isometric contractions and isokinetic movements. Sinusoidal oscillations led to the expression of (i) Bode diagrams of the musculo-articular system allowing the determination of a da...

Journal: :Soft matter 2017
Rong An Liangliang Huang Kenneth P Mineart Yihui Dong Richard J Spontak Keith E Gubbins

In this work, we present a statistical mechanical analysis to elucidate the molecular-level factors responsible for the static and dynamic properties of polymer films. This analysis, which we term conformal sites theory, establishes that three dimensionless parameters play important roles in determining differences from bulk behavior for thin polymer films near to surfaces: a microscopic wettin...

2002
G. G. Rooney P. F. Linden

NOTATION A 'Effective area' in Boussinesq ventilation model, see eqn (24) ,4 'Effective area' in non-Boussinesq ventilation model, see eqn (28) A I Area of floor covered by base of fire a Area of vent B Plume buoyancy flux b Plume radius c r Specific heat capacity at constant pressure D Diameter of fire source d Upper-layer depth F Scaled density deficit, a conserved quantity with units of buoy...

Journal: :Transactions of the Society of Instrument and Control Engineers 1982

2009
Mohammed F. Islam L. M. Lye

In this paper, a combined use of dimensional analysis (DA) and modern statistical design of experiment (DOE) methodologies is proposed for a hydrodynamics experiment where there are a large number of variables. While DA is well-known, DOE is still unfamiliar to most ocean engineers although it has been shown to be useful in many engineering and non-engineering applications. To introduce and ill...

Journal: :Journal of Experimental and Theoretical Physics 2021

We discuss two scenarios of emergent gravity. In one them the quantum vacuum is considered as superplastic crystal, and effective gravity describes dynamical elastic deformations this crystal. other gravitational tetrads emerge bilinear form fermionic fields. spite essentially different mechanisms gravity, these have important common property: metric field has dimension inverse square length [g...

2011
Bin Xu Cedric Pradalier Roland Siegwart

For the six-wheel CRAB rover, this paper presents the torque control with Kriging estimation to improve the terrainability by minimizing wheel slip. In previous works, we presented a torque control approach, effectively improving terrainability by minimizing the variance of the required friction coefficient based on the static model. Using a Kalman filter to estimate the velocity information, a...

2008
Florent Ravelet Arnaud Chiffaudel François Daviaud

We study the transition from laminar flow to fully developed turbulence for an inertially-driven von Kármán flow between two counter-rotating large impellers fitted with curved blades over a wide range of Reynolds number (10 − 10). The transition is driven by the destabilisation of the azimuthal shear-layer, i.e., Kelvin–Helmholtz instability which exhibits travelling/drifting waves, modulated ...

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