Spatiotemporal behavior of localized current filaments inp-n-p-ndiodes: Numerical calculations and comparison with experimental results

1994 ◽  
Vol 49 (11) ◽  
pp. 7370-7384 ◽  
Author(s):  
F.-J. Niedernostheide ◽  
M. Ardes ◽  
M. Or-Guil ◽  
H.-G. Purwins
Keyword(s):  
Experimental Results ◽  
Numerical Calculations ◽  
Spatiotemporal Behavior ◽  
Current Filaments

Viscous Dissipation in Laminar Water Flows in Micro-Tubes

2007 ◽  
Author(s):  
In-Hwan Yang ◽  
Mohamed S. El-Genk
Keyword(s):  
Experimental Data ◽  
Viscous Dissipation ◽  
Temperature Rise ◽  
Experimental Results ◽  
Numerical Calculations ◽  
Analytical Expression ◽  
Water Flows ◽  
Good Agreement

Numerical calculations are performed to investigate the effect of viscous dissipation on the temperature rise and friction numbers for laminar water flows in micro-tubes. The calculated values are compared with those determined from reported experimental data for glass and diffused silica micro-tubes (D = 16 – 101 μm and L/D = 625 – 1479). The results confirm a definite slip at the wall with slip lengths of ∼ 0.7 μm and 1.0 μm, which decrease the friction number and the temperature rise in the micro-tubes, but their effect gradually diminishes as either D or L/D increases. The friction number decreases exponentially as D decreases and, to a lesser extent, as L/D increases. The effect of L/D on the friction number is insignificant for micro-tube diameters ≤ 20 μm. For D > 400 μm, the friction number approaches that of Hagen-Posieuille of 64 for macro-tubes when L/D > 1500, but approaches higher values at smaller L/D. The dimensionless analytical expression developed for calculating the friction number and the temperature rise for water flows in micro-tubes is in good agreement with both the numerical and experimental results.

scholarly journals Numerical analysis of the impact of removing a corner column in a continuous slab-column structure in relation to the experimental model

2020 ◽  
Vol 310 ◽  
pp. 00054
Author(s):  
Miroslaw Wieczorek
Keyword(s):  
Numerical Analysis ◽  
Numerical Modelling ◽  
Experimental Model ◽  
Experimental Research ◽  
Experimental Results ◽  
Numerical Calculations ◽  
Column Structure ◽  
Continuous Slab ◽  
The Impact ◽  
Model Support

The paper presents the numerical analysis of the impact of removing a corner column on the behavior of a continuous slab-column structure. The model uses the minimal reinforcement amount compliant with Eurocodes. The basis for numerical modelling was the experimental research of a piece of a slab-column structure with the dimensions of 3.0×3.0 m in column axes. The article includes a detailed description of the assumed conditions of the model support, the method of loading and reading of the results. The paper also compares the obtained results of numerical calculations with experimental results.

Magnetoimpedance of sandwiched films: experimental results and numerical calculations

2002 ◽  
Vol 242-245 ◽  
pp. 291-293 ◽  
Author(s):  
G.V. Kurlyandskaya ◽  
J.L. Muñoz ◽  
J.M. Barandiarán ◽  
A. Garcı́a-Arribas ◽  
A.V. Svalov ◽  
...  
Keyword(s):  
Experimental Results ◽  
Numerical Calculations

EXPERIMENTAL EVIDENCE ON THE STRUCTURE AND EVOLUTION OF THE PENTA–HEPTA DEFECT IN HEXAGONAL LATTICES DUE TO BÉNARD–MARANGONI CONVECTION

2001 ◽  
Vol 11 (05) ◽  
pp. 1261-1273 ◽  
Author(s):  
V. O. AFENCHENKO ◽  
A. B. EZERSKY ◽  
A. V. NAZAROVSKY ◽  
M. G. VELARDE
Keyword(s):  
Experimental Evidence ◽  
Qualitative Agreement ◽  
Marangoni Convection ◽  
Hexagonal Lattice ◽  
Experimental Results ◽  
Numerical Calculations ◽  
Good Qualitative Agreement ◽  
Topological Charges

Evidence is provided to show that the penta–hepta defect in a Bénard convective hexagonal lattice arises as a result of the attraction of two dislocations having opposite topological charges and belonging to different modes. The dislocations approach each other along a corridor connecting those topological charges. Fields of long–living penta–hepta defects have been analyzed. The comparison of experimental results with recent numerical calculations and solutions obtained analytically shows good qualitative agreement.

Numerical Study of Flow and Temperature Patterns During the Growth of GaPO4 Crystals Using the Lattice-Boltzmann Method

1998 ◽  
Vol 09 (08) ◽  
pp. 1567-1576 ◽  
Author(s):  
Wolfram Miller ◽  
Klaus Böttcher
Keyword(s):  
Physical Properties ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Reasonable Agreement ◽  
Numerical Study ◽  
Experimental Results ◽  
Numerical Calculations ◽  
Boltzmann Method

The lattice-Boltzmann method (LBM) with enhanced collisions is used to calculate the flow and the temperature in an equipment used for growing GaPO 4 crystals from solution. For this purpose the lattice-Boltzmann method is extended to handle blocks with different physical properties. The results of our numerical calculations for the velocities and the temperatures in the solution are in reasonable agreement with recent experimental results.

Geometric Model and Elastic Constant Prediction of 3D Four-Step Braided Composites Based on the Cubic Spline Curve

2016 ◽  
Vol 08 (02) ◽  
pp. 1650019 ◽  
Author(s):  
Chenbing Ni ◽  
Gaofeng Wei
Keyword(s):  
Geometric Model ◽  
Three Dimensional ◽  
Cubic Spline ◽  
Numerical Results ◽  
Unit Cell ◽  
Experimental Results ◽  
Numerical Calculations ◽  
Braided Composites ◽  
Spline Curve ◽  
Cubic Spline Curve

In this paper, the three-dimensional (3D) four-step ([Formula: see text]) rectangular braided composites are analyzed, the internal yarn spatial topology and mechanical model are determined, a new geometric model, which uses a cubic spline curve to fit yarn trajectory, is presented. The new geometric model can be divided into three types of unit cell models which are the interior, surface and corner unit cell. Based on the new proposed geometric model and the stiffness averaging theory, the corresponding elastic constants are predicted. The predicted numerical results are calculated, and compared with the experimental results. Numerical examples indicate that the numerical calculations well agree with the experimental results. Error values between numerical calculations and experimental results are less than 7.5%. The numerical results verify the validity and accuracy of the new geometrical model.

Thermodynamics of sodium feldspar II: Experimental results and numerical calculations

1985 ◽  
Vol 12 (2) ◽  
pp. 99-107 ◽  
Author(s):  
E. Salje ◽  
B. Kuscholke ◽  
B. Wruck ◽  
H. Kroll
Keyword(s):  
Experimental Results ◽  
Numerical Calculations ◽  
Sodium Feldspar

Reflexionserscheinungen bei Torsions-Alfvén-Wellen in inhomogenen Magnetfeldern/ Reflection Phenomena of Torsional Alfvén Waves in Inhomogeneous Magnetic Fields

1975 ◽  
Vol 30 (12) ◽  
pp. 1594-1599
Author(s):  
E. Räuchle ◽  
P. G. Schüller
Keyword(s):  
Magnetic Fields ◽  
Experimental Results ◽  
Numerical Calculations ◽  
Wave Frequency ◽  
Field Inhomogeneity ◽  
Cylindrical Plasma ◽  
Spatially Inhomogeneous ◽  
Strong Reflection ◽  
Order Of Magnitude ◽  
Good Agreement

Abstract The propagation of torsional Alfen waves in a cylindrical plasma is investigated. Superimposed on the plasma are various types of spatially inhomogeneous axisymmetric magnetic fields. Characteristic examples are: in the direction of propagation spatially decreasing, increasing and periodically modulated magnetic fields. The wave lengths are of the same order of magnitude as the characteristic lengths of the inhomogeneities. Strong reflection is observed which depends on wave frequency and strength of the field inhomogeneity. There exists good agreement between experimental results and numerical calculations.

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