scholarly journals Cross-Sectional Temperature Field of a Solar Collector’s Absorber: Development of the Model / Saules Kolektora Absorbera Šķērsgriezuma Temperatūras Lauks Apaļas Caurulītes Gadījumā – Fināla Modelis

2013 ◽  
Vol 50 (2) ◽  
pp. 33-41
Author(s):  
V. Barkans ◽  
P. Shipkovs ◽  
M. Vanags
Keyword(s):  
Temperature Field ◽  
Cross Section ◽  
Field Model ◽  
Plate Thickness ◽  
Pipe Diameter ◽  
Geometrical Parameters ◽  
Cross Sectional ◽  
Temperature Variations ◽  
Temperature Field Model ◽  
Optimal Values

In the work, the temperature field model is developed for the absorber of a round-pipe collector. As distinguished from previous models when the temperature of liquid was assumed to be constant over the entire pipe crosssection, the results obtained clearly show the temperature variations in the absorber’s cross-section. In the work, optimal values are found in the work for geometrical parameters of the collector (i.e. the plate thickness and the pipe diameter) that allow the highest possible temperature of liquid to be achieved.

Temperature Field Simulation of Air Cooling Condition 40Cr ANSYS

2011 ◽  
Vol 291-294 ◽  
pp. 790-793
Author(s):  
Lian Sheng Chen ◽  
Yan Hong Leng ◽  
Yan Kai Han ◽  
Jin Ying Song
Keyword(s):  
Temperature Field ◽  
Field Model ◽  
Quantitative Description ◽  
Cooling Condition ◽  
Transient Temperature ◽  
Air Cooling ◽  
Thermal Compensation ◽  
Cross Sectional ◽  
Transient Temperature Field ◽  
Temperature Field Model

The latent heat’s releasing has effect on temperature dropping.. For example of 40Cr bar, using ANSYS finite element establish transient temperature field model in air cooling condition, and using Thermal compensation calculate latent heat can simulate cross-sectional temperature field in air cooling, obtain the temperature variation with time, this founds base for the quantitative description of the microstructure and properties of rolled steel.

Comparative Analysis of Temperature Field Model and Design of Cooling System Structure Parameters of Submersible Motor

2021 ◽  
pp. 1-30
Author(s):  
Qi Zhang ◽  
Zengliang Li ◽  
Xiangwei Dong ◽  
Yanxin Liu ◽  
Ran Yu
Keyword(s):  
Temperature Field ◽  
Field Model ◽  
Cooling System ◽  
System Structure ◽  
Structure Parameters ◽  
Bidirectional Coupling ◽  
Temperature Field Model ◽  
Submersible Motor ◽  
Coupling Mode ◽  
Two Temperature

Abstract The reliability of submersible motor is the key to determining the stability of the middle and deep sea exploration and development equipment. In this paper, in view of different equivalent modes of convective heat transfer of housing surface, two temperature field models are established in the finite volume method (FVM). The unidirectional and bidirectional coupling mode between loss and temperature of motor are analyzed, and the temperature calculation results are compared when the oil friction loss and copper loss are constant and variable. Then, the bidirectional coupling mode between radiator temperature field and cooling system internal flow field is determined based on the structural parameters of radiator and cooling circulation impeller. The circulation flow is simulated and the influence of different loss unidirectional coupling modes on the temperature field is compared. Finally, the cooling system design procedure is proposed to obtain the matching relationship of the same cooling system structure parameters of the two temperature field models. Experimental validation is presented, and a more reasonable temperature field model is obtained under the coupling mode proposed. It provides the necessary theoretical basis for the research on the submersible motor cooling system.

Estimation of Nusselt Number in Microchannels of Arbitrary Cross-Section With Constant Axial Heat Flux

2008 ◽  
Author(s):  
Ehsan Sadeghi ◽  
Majid Bahrami ◽  
Ned Djilali
Keyword(s):  
Heat Flux ◽  
Nusselt Number ◽  
Cross Section ◽  
Cross Sections ◽  
Numerical Solutions ◽  
Arbitrary Cross Section ◽  
Geometrical Parameters ◽  
Thermal Systems ◽  
Cross Sectional ◽  
Axial Heat

In many practical instances such as basic design, parametric study, and optimization analysis of thermal systems, it is often very convenient to have closed form relations to obtain the trends and a reasonable estimate of the Nusselt number. However, finding exact solutions for many practical singly-connected cross-sections, such as trapezoidal microchannels, is complex. In the present study, the square root of cross-sectional area is proposed as the characteristic length scale for Nusselt number. Using analytical solutions of rectangular, elliptical, and triangular ducts, a compact model for estimation of Nusselt number of fully-developed, laminar flow in microchannels of arbitrary cross-sections with “H1” boundary condition (constant axial wall heat flux with constant peripheral wall temperature) is developed. The proposed model is only a function of geometrical parameters of the cross-section, i.e., area, perimeter, and polar moment of inertia. The present model is verified against analytical and numerical solutions for a wide variety of cross-sections with a maximum difference on the order of 9%.

scholarly journals Transient Temperature Field Model of Wear Land on the Flank of End Mills: A Focus on Time-Varying Heat Intensity and Time-Varying Heat Distribution Ratio

2019 ◽  
Vol 9 (8) ◽  
pp. 1698 ◽  
Author(s):  
Du ◽  
Yue ◽  
Liu ◽  
Liang ◽  
Wang ◽  
...  
Keyword(s):  
Temperature Field ◽  
High Speed ◽  
Field Model ◽  
Transient Temperature ◽  
Time Varying ◽  
Peripheral Milling ◽  
Transient Temperature Field ◽  
Proposed Model ◽  
Temperature Field Model ◽  
End Mills

Modelling methods for the transient temperature field of wear land on the flank of end mills have been proposed to address the challenges of inaccurate prediction in the temperature field of end mills during the high-speed peripheral milling of Ti6Al4V that is a titanium alloy. A transient temperature rise model of wear land on the flank of end mills was constructed under the influence of heat sources in the primary shearing zone (PSZ), rake-chip zone (RCZ), flank-workpiece zone (FWZ), and dissipating heat source. Then the transient temperature field model of wear land on the flank of end mills was constructed. Finally, the transient temperature field model of wear land on the flank of end mills was constructed. Comparison of simulation result and experimental data verified the accuracy of the model. In sum, the proposed model may provide a temperature model support for future studies of flank wear rate in end mill modeling.

SURFACE TEMPERATURE FIELD MODEL AND INFLUENCE FACTORS OF HF CVD DIAMOND FILMS ON WC–Co ALLOYS

2006 ◽  
Vol 13 (05) ◽  
pp. 661-668
Author(s):  
SHA LIU ◽  
JING QIU ZHANG
Keyword(s):  
Temperature Field ◽  
Surface Temperature ◽  
Field Model ◽  
Influence Factors ◽  
Diamond Films ◽  
Thermal Source ◽  
Heat Conductivity Coefficient ◽  
Temperature Field Model ◽  
Surface Temperature Field ◽  
Co Alloys

The surface temperature field model of hot filament chemical vapor deposition (HF CVD) diamond films on WC – Co alloys was constructed and calculated by taking into account the influences of both thermal source properties and physical properties of substrates. Under the certain conditions of some parameters, the effects of the influence factors such as the maximum specific heat flux (q m ), the heat conductivity coefficient (λ) of the substrate and the substrate height (h) on the surface temperature field were exhibited quickly and clearly by the computer modeling. The theoretical calculating data are close to the experimental results. It is found that the influences of the thermal source parameter, the substrate height, and the heat conductivity coefficient of the substrate materials on the surface temperature field of diamond films on WC – Co alloys are almost equally important.

Three-dimensional transient temperature field model for laser annealing

2005 ◽  
Vol 97 (3) ◽  
pp. 033520 ◽  
Author(s):  
Jean-Yves Degorce ◽  
Jean-Numa Gillet ◽  
François Magny ◽  
Michel Meunier
Keyword(s):  
Temperature Field ◽  
Laser Annealing ◽  
Field Model ◽  
Three Dimensional ◽  
Transient Temperature ◽  
Transient Temperature Field ◽  
Temperature Field Model

Research on a 3D Temperature Field Model of a Slab with Oxide Layer Growth

2015 ◽  
Vol 46 (2) ◽  
pp. 147-159
Author(s):  
Xiao-xu Dong ◽  
An-rui He ◽  
Wen-quan Sun ◽  
Zhu-bing Liu ◽  
Bo Hong
Keyword(s):  
Temperature Field ◽  
Oxide Layer ◽  
Field Model ◽  
Layer Growth ◽  
Temperature Field Model
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