Numerical simulation and analytical description of thermally induced birefringence in laser rods

2000 ◽  
Vol 36 (5) ◽  
pp. 620-626 ◽  
Author(s):  
M. Schmid ◽  
R. Weber ◽  
T. Graf ◽  
M. Roos ◽  
H.P. Weber
Keyword(s):  
Numerical Simulation ◽  
Analytical Description ◽  
Thermally Induced

Analysis of the temperature curves in non-isothermal adsorption on compacted zeolites

1984 ◽  
Vol 49 (4) ◽  
pp. 911-919 ◽  
Author(s):  
Milan Kočiřík ◽  
Arkadii G. Bezus ◽  
Arlette Zikánová ◽  
Irina T. Erashko ◽  
Michail M. Dubinin ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Heat Transport ◽  
Kinetic Data ◽  
Kinetic Equations ◽  
Analytical Description ◽  
Isothermal Adsorption

An analytical description is presented of the temperature curves describing adsorption on thin zeolite plates. The solution, based on the model of simultaneous mass and heat transport was obtained by linearization of the kinetic equations. A method is proposed for verification of the plausibility of the model and for evaluation of the kinetic data by numerical simulation of the temperature curves.

The mixing in a room by a localized finite-mass-flux source of buoyancy

2002 ◽  
Vol 471 ◽  
pp. 33-50 ◽  
Author(s):  
C. P. CAULFIELD ◽  
ANDREW W. WOODS
Keyword(s):  
Numerical Simulation ◽  
Mass Flux ◽  
Momentum Flux ◽  
Analytical Description ◽  
Return Flow ◽  
Asymptotic Model ◽  
Buoyant Plume ◽  
Finite Mass ◽  
Ambient Fluid ◽  
Source Fluid

The mixing produced by a turbulent buoyant plume with finite mass flux in a room is examined analytically and numerically. The entrainment of ambient fluid into the ascending buoyant plume leads to a return flow in the room which carries fluid downwards from the top of the room. The cycling of ambient fluid through the buoyant plume and the return flow causes the density to become uniform and gradually evolve towards that of the source fluid. As a result the buoyancy flux associated with the input fluid decreases and the plume motion becomes dominated by the source momentum flux. We develop an asymptotic model of the mixing using buoyant plume theory for a momentum-dominated flow. This provides an analytical description of the evolution of the density in the room which is in excellent accord with a full numerical simulation, and provides an improved description of the experimental filling-box data originally presented by Baines & Turner (1969).

scholarly journals Effects of change in orientation and surface roughness of terrain oil thermally induced up slope flows in western Ghats: A numerical study

MAUSAM ◽  
2022 ◽  
Vol 46 (4) ◽  
pp. 367-376
Author(s):  
M. TIWARI ◽  
N. RAMANATHAN
Keyword(s):  
Numerical Simulation ◽  
Surface Roughness ◽  
Western Ghats ◽  
Roughness Length ◽  
Mesoscale Model ◽  
Numerical Study ◽  
Western Ghat ◽  
Thermally Induced ◽  
Slope Flow

ABSTRACT. The effect of change in orientation and surface roughness of terrain on the daytime up slope flow is investigated using a 2-dimensional mesoscale model. A realistic orography profile of western ghat is chosen for the purpose. Twelve hour of integrations are performed starting from sunrise. The numerical simulation have shown that the intensity of up slope flows remained practically unaffected by change of orientation of terrain. However, increase in roughness length decreases the intensity of developed flows. For comparison purposes, the results of previous investigators are verified with a change in slope angles.    

scholarly journals Numerical Analysis of the Influence of Electrode Inclination on Temperature Distribution during GMAW Overlaying

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Jerzy Winczek ◽  
Marek Gucwa ◽  
Miloš Mičian ◽  
Krzysztof Makles
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Theoretical Model ◽  
Temperature Distribution ◽  
Numerical Analysis ◽  
Heat Source ◽  
Analytical Description ◽  
Source Model ◽  
Heat Source Model ◽  
Inclination Angles

In the work, an analysis of the influence of electrode inclination on the distribution of temperature in the weld overlaying has been conducted. In the analytical description of the temperature field, a volumetric heat source model with an inclined axis with respect to the direction of surfacing was adopted. In the numerical simulation, the own theoretical model of heat source, algorithm, and program performed in the Borland Delphi environment were used. In the calculation examples, different electrode inclination angles were adopted in relation to the welded plate, in the direction of surfacing, opposite to the direction of welding, and perpendicular to the weld bead.

Numerical simulation of thermally induced gyres in Lake Biwa

2003 ◽  
Vol 17 (14) ◽  
pp. 2947-2956 ◽  
Author(s):  
Yosuke Yamashiki ◽  
Michio Kumagai ◽  
Chunmeng Jiao ◽  
Iehisa Nezu ◽  
Saburo Matsui
Keyword(s):  
Numerical Simulation ◽  
Lake Biwa ◽  
Thermally Induced
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