Finite element analysis of fluid flows with moving boundary

2002 ◽  
Vol 16 (5) ◽  
pp. 683-695 ◽  
Author(s):  
Kyung Se Cha ◽  
Jong Wook Choi ◽  
Chan Guk Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Moving Boundary ◽  
Fluid Flows ◽  
Element Analysis ◽  
Analysis Of Fluid Flows

Numerical Simulation on Temperature Field in Single-Layer Laser Cladding Using Coaxial Inside-Beam Powder Feeding

2010 ◽  
Vol 426-427 ◽  
pp. 151-155 ◽  
Author(s):  
Ming Di Wang ◽  
Shi Hong Shi ◽  
Dun Wen Zuo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Distribution ◽  
Laser Cladding ◽  
Moving Boundary ◽  
Single Layer ◽  
Layer By Layer ◽  
Analysis Model ◽  
Element Analysis ◽  
Powder Feeding

For the disadvantages of the lateral powder feeding and multi-lateral coaxial powder feeding process in laser cladding rapid prototyping process, a new process of hollow focusing laser, powder tube being middle and inside-beam powder feeding is put forward, which can be especially apply in laser cladding. In this paper, the finite element analysis model of temperature of the laser cladding using inside-beam powder feeding is established, temperature distribution of the single-layer in laser cladding is researched, which is theoretically useful for controlling the quality of microstructure and to prevent the cracks. When adopting finite element analysis software, Ansys, the layer unit is acted layer-by-layer, the full simulation of real cladding deposition process will be realized if moving boundary. Finally, some experiments validate the simulation results. Compared with the original mode, it can be found that if adopting the system of the laser cladding rapid manufacturing using inside-beam powder feeding, the temperature distribution is different and it will lead to a denser microstructure.

Ratcheting due to Thermal Stratification

2019 ◽  
Author(s):  
R. Adibi-Asl ◽  
D. O’Kane ◽  
E. Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Distribution ◽  
Thermal Stratification ◽  
Fluid Flows ◽  
Uniform Temperature ◽  
Element Analysis ◽  
Steady State Condition ◽  
Thermal Ratcheting ◽  
The Finite Element Analysis

Abstract Thermal ratcheting is required to be checked by most of the piping design codes, specifically the ASME B&PV Code. For cases where the variation of temperature distribution is not uniform, the existing ratchet check methodology for piping is inadequate and therefore the finite element analysis (FEA) is often used to perform ratchet checks. Thermal stratification, in which cold and hot fluid flows are layered in a relatively steady state condition, is a good example of non-linear/non-uniform temperature distribution across the pipe. This paper develops straightforward equations to address thermal stratification in piping. Finite element analysis is used to benchmark the results.

CIP-Finite Element Analysis for Unsteady Two-Dimensional Viscous Fluid Flows

2000 ◽  
Vol 2000.13 (0) ◽  
pp. 115-116
Author(s):  
Yoshihito YAMADA ◽  
Changcheng SHAO ◽  
Yasuhiro MATSUDA ◽  
Masato YOSHINO
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Viscous Fluid ◽  
Fluid Flows ◽  
Two Dimensional ◽  
Element Analysis

Modeling a high-speed pin-on-disk experiment

2021 ◽  
pp. 154851292110403
Author(s):  
Aron Wing ◽  
Tony Liu ◽  
Anthony Palazotto
Keyword(s):  
Heat Transfer ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Spectral Methods ◽  
High Speed ◽  
Moving Boundary ◽  
Frictional Heat ◽  
Element Analysis ◽  
One Dimensional ◽  
Pin On Disk

The purpose of this work is to analyze the heat transfer characteristics of Vascomax®C300 during high-speed sliding. This work extends previous research that is intended to help predict the wear-rate of connecting shoes for a hypersonic rail system at Holloman Air Force Base to prevent critical failure of the system. Solutions were generated using finite element analysis and spectral methods. The frictional heat generated by the pin-on-disk is assumed to flow uniformly and normal to the face of the pin and the pin is assumed to be a perfect cylinder resulting in two-dimensional heat flow. Displacement data obtained from the experiment is used to define the moving boundary. The distribution of temperature resulting from transient finite element analysis is used to justify a one-dimensional model. Spectral methods are then employed to calculate the spatial derivatives improving the approximation of the function which represents the data. It is concluded that a one-dimensional approach with constant heat transfer parameters sufficiently models the high-speed pin-on-disk experiment.

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