Molecular structure design of surfactant enhances heat transfer

2021 ◽  
Vol 2021 (8) ◽  
pp. 5-6
Keyword(s):  
Molecular Structure ◽  
Heat Transfer ◽  
Structure Design

Characteristics of Thermal–Hydraulic and Heat Transfer in Liquid Windowless Target of Accelerator Driven Subcritical

2018 ◽  
Vol 4 (3) ◽  
Author(s):  
Feng Wang ◽  
Qiang Wen ◽  
Xue Qin
Keyword(s):  
Heat Transfer ◽  
Morphological Characteristics ◽  
Transfer Characteristic ◽  
Structure Design ◽  
Liquid Lead ◽  
Target Area ◽  
Interface Morphology ◽  
Free Interface ◽  
Vof Model ◽  
Free Interfaces

In recent years, the morphological characteristics and stabilization methods of free interface in liquid windowless target become hot research topics in accelerator driven subcritical system (ADS). Based on the structure design of a certain windowless spallation target, computational fluid dynamics (CFD) software of CFX was used to simulate and analyze its free interface character. The method of k–ε turbulence, cavitation, and volume of fluid (VOF) model was used to study the flow characteristic of liquid Lead-Bismuth eutectic (LBE) alloy with cavitation phase change and to analyze the free interface morphology characteristics of coolant in the target area. It is concluded that the target region forms two stable free interfaces when fluid outlet pressure is in the range of 10–40 kPa and fluid entrance velocity is in the range of 0.5–1.2 m/s. The flow field near the free interface structure is complex. The vortex region appears, and the disorders in the vortex flow pattern lead to fluctuation of the free interface. After the study of stable free interface morphology establishing process, heat transfer characteristic of windowless target was further analyzed.

Recent development of heavy atom-free triplet photosensitizers: molecular structure design, photophysics and application

2021 ◽  
Author(s):  
Xue Zhang ◽  
Zhijia Wang ◽  
Yuqi Hou ◽  
Yuxin Yan ◽  
Jianzhang Zhao ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Heavy Atom ◽  
Structure Design

Triplet photosensitizers (PSs) have attracted much attention in recent years, due to the significance of this kind of compounds in fundamental photochemistry study, as well as of applications in photocatalysis,...

Molecular structure design of conjugated microporous poly(dibenzo[b,d]thiophene 5,5-dioxide) for optimized photocatalytic NO removal

2018 ◽  
Vol 357 ◽  
pp. 188-194 ◽  
Author(s):  
Yonggang Xiang ◽  
Xuehao Zhang ◽  
Xuepeng Wang ◽  
Xing Ding ◽  
Dekang Huang ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Structure Design ◽  
No Removal

Thermal-Structural Analysis for the Optimization of a Low Beam Projector Headlight Design

2015 ◽  
Vol 656-657 ◽  
pp. 747-752
Author(s):  
Jiing Hung You ◽  
Tamara Trejos ◽  
Huann Ming Chou ◽  
Song Hao Wang
Keyword(s):  
Heat Transfer ◽  
Thermal Expansion ◽  
Structure Design ◽  
Heat Transfer Analysis ◽  
Normal Operation ◽  
Complex Geometries ◽  
Switching Mechanism ◽  
Engineering Software ◽  
Modern Engineering ◽  
Structural Stresses

This paper is to demonstrate the application of modern Engineering Software to improve and advance the mechanical desig processes of a low beam projector headlight. Nowadays, advanced finite element tools are able to run and coupled different physics modules to analyze complex geometries and their material combinations. The particular issue in this study is the light switching mechanism in a headlight structure design. During lighting, the jam of the low beam projector solenoid actuated pivot due to thermal expansions has been distressing the normal operation of the overall headlight structure. A comparison between the original and a new convection enhanced head lamp design is therefore scrutinized. For both cases, heat transfer analysis, where it was included natural convection, conduction, and radiation with a concentrated heat source are proposed in order to obtain the temperature distribution fields at the light switching mechanism. The results were used to run future structural stresses analyses where the average thermal expansion of the crankshaft mechanism was determined.

Numerical Simulation of Stress and Deformation on Heat Transfer

2011 ◽  
Vol 422 ◽  
pp. 842-845
Author(s):  
Xue Ping Wang ◽  
Ying Zhang ◽  
Pan Li ◽  
Zhen Wei Zhang
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Heat Exchange ◽  
Structure Design ◽  
Stress And Strain ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Stress And Deformation

This paper primarily simulates the heat exchange part’s stress and strain situation under the load of temperature and gravity and their coupling impact aiming at obtaining the stress and deformation distribution. The authors took advantage of the method of the finite element analysis to study the stress and strain situation. Through the analysis, each part of the transfer’s stress and strain can be calculated. The conclusion of this paper provides the basis for the further enhancement of the machine life and optimization of the structure design.

Analysis of Heat Transfer in Particle Velocity Sensor with Three-Wire Configuration

2020 ◽  
Author(s):  
Zhu Linhui ◽  
Shen Jienan ◽  
Zeng Yibo ◽  
Guo Hang
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Forced Convection ◽  
Analytical Model ◽  
Particle Velocity ◽  
Structure Design ◽  
Distribution Model ◽  
Thermal Perturbation ◽  
Velocity Sensor ◽  
Perturbation Field

Abstract Particle velocity sensor (PVS) plays an important role in determining the type and location of a sound source. In this presentation, analytical model of heat transfer in PVS with a three-wire (SHS) configuration was first presented. By comparing with the thermal diffusion motion, the forced convection exerts a smaller influence on the temperature distribution. Thus, variation in forced convection could induce the formation of a thermal perturbation field. The overall temperature distribution model of a PVS is made up of a steady temperature field and a thermal perturbation field. With the derived model, PVS with SHS configuration has smaller thermal noise and higher signal-to-noise ratio in comparision with a two-wire (SS) configuration under the same conditions. Optimized parameters of structure design and heating power could be obtained via the analysis model. Also, this model gives optimal output performance and frequency-dependent characteristic curve. Numerical results are found to be in good agreement with the analytical solutions and experimental data, which verify the correctness of analytical model and numerical method. The study provides a basis for a theoretical and numerical analysis.

Sign in / Sign up

Export Citation Format

Share Document