scholarly journals A 3D model of the thermal field within the Polish Carpathians and the Carpathian Foredeep (S Poland)

2021 ◽  
Vol 65 (3) ◽  
Author(s):  
Rafał KUDREWICZ
Keyword(s):  
3D Model ◽  
Thermal Field ◽  
Carpathian Foredeep ◽  
Polish Carpathians ◽  
S Poland

Calculation on Thermal Field of a Doubly-Fed Induction Generator with Axial-Radial Ventilation Cooling System

2011 ◽  
Vol 383-390 ◽  
pp. 7004-7010
Author(s):  
Zhi Qiang Zhang ◽  
Bao Jun Ge
Keyword(s):  
Field Distribution ◽  
3D Model ◽  
Thermal Field ◽  
Cooling System ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Water Cooling ◽  
Electromagnetic Structure ◽  
Influence Of Water ◽  
Doubly Fed

A type of doubly-fed induction generator with air-water cooling and axial-radial ventilation cooling system is proposed in this paper. A half-axial segment stator-rotor coupled thermal field 3D model of the doubly-fed induction generator prototype is built with some properly assumptions, according to its symmetry in electromagnetic structure and cooling system. Stator-rotor coupled thermal field distribution of prototype is calculated under rated operating. The influence of water mass-flow and number of cooling-ribs to the thermal field distribution is also studied with the 3D model.

scholarly journals Rare, threatened and new for Poland macromycetes found in Bukowiec reserve (W Carpathians)

2014 ◽  
Vol 35 (2) ◽  
pp. 197-216 ◽  
Author(s):  
Anna Miśkiewicz
Keyword(s):  
Polish Carpathians ◽  
S Poland ◽  
W Carpathians

In the paper 36 rare or threatened, 6 new for Poland and 24 new for Polish Carpathians taxa of macrofungi are presented. They were found during two-years investigations carried out in Bukowiec reserve (Pogórze Wiśnickie region, W Carpathians, S Poland).

scholarly journals Numerical modeling of DC busbar contacts

2011 ◽  
Vol 24 (2) ◽  
pp. 209-219 ◽  
Author(s):  
Ioan Popa ◽  
Alin-Iulian Dolan
Keyword(s):  
Contact Resistance ◽  
3D Model ◽  
Thermal Field ◽  
Source Term ◽  
Numerical Models ◽  
Space Distribution ◽  
Additional Source ◽  
Field Problem ◽  
Optimal Geometry ◽  
Limit Value

The paper presents two electro-thermal numerical models which can be used for the modeling and optimization of high currents busbar contacts for DC. The models are obtained by coupling of the electric model with the thermal field problem. The coupling is carried out by the source term of the differential equation which describes the thermal field. The models allows the calculation of the space distribution of the electric quantities (electric potential, the gradient of potential and the current density) and of the thermal quantities (the temperature, the temperature gradient, the Joule losses and heat flow). A heating larger than that of the busbar appears in the contact zone, caused by the contact resistance. The additional heating, caused by the contact resistance is simulated by an additional source injected on the surface of contact. The 2D model has been solved by the finite volumes method while the 3D model, by the finite elements method. Both models were experimentally validated. Using the models, one can determine the optimal geometry of dismountable contact for an imposed limit value of the temperature.

THERMAL FIELD DESORPTION

1989 ◽  
Vol 50 (C8) ◽  
pp. C8-9-C8-14
Author(s):  
H. J. KREUSER ◽  
L. C. WANG
Keyword(s):  
Thermal Field ◽  
Field Desorption

Generation of a 3D model to better mimic NAFLD in vitro

2016 ◽  
Vol 54 (12) ◽  
pp. 1343-1404
Author(s):  
LS Spitzhorn ◽  
MA Kawala ◽  
J Adjaye
Keyword(s):  
3D Model

Evaluation of geometrical benchmark artifacts containing multiple overhang lengths fabricated using material extrusion technique

2020 ◽  
Vol 14 (3) ◽  
pp. 7296-7308
Author(s):  
Siti Nur Humaira Mazlan ◽  
Aini Zuhra Abdul Kadir ◽  
N. H. A. Ngadiman ◽  
M.R. Alkahari
Keyword(s):  
3D Model ◽  
Laser Scanner ◽  
Dimensional Accuracy ◽  
Fused Deposition Modelling ◽  
Layer By Layer ◽  
Fused Deposition ◽  
Layer Technique ◽  
Subtractive Manufacturing ◽  
Manufacturing Features ◽  
Layer Problem

Fused deposition modelling (FDM) is a process of joining materials based on material entrusion technique to produce objects from 3D model using layer-by-layer technique as opposed to subtractive manufacturing. However, many challenges arise in the FDM-printed part such as warping, first layer problem and elephant food that was led to an error in dimensional accuracy of the printed parts especially for the overhanging parts. Hence, in order to investigate the manufacturability of the FDM printed part, various geometrical and manufacturing features were developed using the benchmarking artifacts. Therefore, in this study, new benchmarking artifacts containing multiple overhang lengths were proposed. After the benchmarking artifacts were developed, each of the features were inspected using 3D laser scanner to measure the dimensional accuracy and tolerances. Based on 3D scanned parts, 80% of the fabricated parts were fabricated within ±0.5 mm of dimensional accuracy as compared with the CAD data. In addition, the multiple overhang lengths were also successfully fabricated with a very significant of filament sagging observed.

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