Finite element analysis of heat generation/absorption of viscous dissipation effects on MHD Casson fluid flow over exponentially accelerated temperature with ramped surface concentration

2020 ◽  
Author(s):  
Sweta Matta ◽  
Bala Siddulu Malga ◽  
Lakshmi Appidi ◽  
P. Pramod Kumar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fluid Flow ◽  
Viscous Dissipation ◽  
Heat Generation ◽  
Surface Concentration ◽  
Casson Fluid ◽  
Element Analysis

Finite Element Analysis of Magneto-Hydrodynamic Casson Fluid Flow Past a Vertical Plate with the Impact of Angle of Inclination

2018 ◽  
Vol 7 (2) ◽  
pp. 383-395 ◽  
Author(s):  
S. V. Sailaja ◽  
B. Shanker ◽  
R. Srinivasa Raju
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fluid Flow ◽  
Vertical Plate ◽  
Casson Fluid ◽  
Element Analysis ◽  
Flow Past ◽  
The Impact

Hysteresis Heating of Railroad Bearing Thermoplastic Elastomer Suspension Element

2017 ◽  
Author(s):  
Oscar O. Rodriguez ◽  
Arturo A. Fuentes ◽  
Constantine Tarawneh ◽  
Robert E. Jones
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Steady State ◽  
Temperature Distribution ◽  
Heat Generation ◽  
Internal Heat ◽  
Thermoplastic Elastomer ◽  
Internal Heat Generation ◽  
Element Analysis ◽  
Railroad Bearing

Thermoplastic elastomers (TPE’s) are increasingly being used in rail service in load damping applications. They are superior to traditional elastomers primarily in their ease of fabrication. Like traditional elastomers they offer benefits including reduction in noise emissions and improved wear resistance in metal components that are in contact with such parts in the railcar suspension system. However, viscoelastic materials, such as the railroad bearing thermoplastic elastomer suspension element (or elastomeric pad), are known to develop self-heating (hysteresis) under cyclic loading, which can lead to undesirable consequences. Quantifying the hysteresis heating of the pad during operation is therefore essential to predict its dynamic response and structural integrity, as well as, to predict and understand the heat transfer paths from bearings into the truck assembly and other contacting components. This study investigates the internal heat generation in the suspension pad and its impact on the complete bearing assembly dynamics and thermal profile. Specifically, this paper presents an experimentally validated finite element thermal model of the elastomeric pad and its internal heat generation. The steady-state and transient-state temperature profiles produced by hysteresis heating of the elastomer pad are developed through a series of experiments and finite element analysis. The hysteresis heating is induced by the internal heat generation, which is a function of the loss modulus, strain, and frequency. Based on previous experimental studies, estimations of internally generated heat were obtained. The calculations show that the internal heat generation is impacted by temperature and frequency. At higher frequencies, the internally generated heat is significantly greater compared to lower frequencies, and at higher temperatures, the internally generated heat is significantly less compared to lower temperatures. However, during service operation, exposure of the suspension pad to higher loading frequencies above 10 Hz is less likely to occur. Therefore, internal heat generation values that have a significant impact on the suspension pad steady-state temperature are less likely to be reached. The commercial software package ALGOR 20.3TM is used to conduct the thermal finite element analysis. Different internal heating scenarios are simulated with the purpose of obtaining the bearing suspension element temperature distribution during normal and abnormal conditions. The results presented in this paper can be used in the future to acquire temperature distribution maps of complete bearing assemblies in service conditions and enable a refined model for the evolution of bearing temperature during operation.

A finite-element analysis of heat generation and transfer during ohmic heating of food

1990 ◽  
Vol 45 (6) ◽  
pp. 1547-1559 ◽  
Author(s):  
A.A.P. De Alwis ◽  
P.J. Fryer
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Heat Generation ◽  
Ohmic Heating ◽  
Element Analysis

610 Finite Element Analysis of the Heat Generation by Friction during Tightening Process of Bolted Joint

2012 ◽  
Vol 2012.87 (0) ◽  
pp. _6-8_
Author(s):  
Uichiro MORI ◽  
Toshimichi FUKUOKA ◽  
Masataka NOMURA
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Heat Generation ◽  
Bolted Joint ◽  
Element Analysis ◽  
Heat Generation By Friction

Evaluation of Vibration Characteristics for Reactor Coolant Pump Considering Fluid Flow Effect

2014 ◽  
Author(s):  
Ik Joong Kim ◽  
Min Chul Kim ◽  
Gyu Ho Jang ◽  
Dae Hee Jeong ◽  
Oak Sug Kim ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fluid Flow ◽  
Response Spectrum ◽  
Vibration Characteristics ◽  
Working Fluid ◽  
Element Analysis ◽  
Coolant Pump ◽  
Flow Effect ◽  
Unbalance Response

Reactor coolant pump (RCP) is designed for the heat transfer of heat which is generated from reactor vessel to steam generators by circulating the coolant water. RCP is the only rotating equipment in the nuclear steam supply system (NSSS). Therefore, the problem of vibration has arisen caused by the hydraulic forces of the working fluid. These forces can drastically alter the critical speeds and stability characteristics and can act as significant destabilizing forces. So, vibration evaluation of RCP has been considered as a very important issue [1]. Among them, unbalance response caused by weight of unbalancing of rotating shaft could have serious effects on the entire rotor system. Thus, precise unbalance response spectrum analyses are required. In general, in order to evaluate the unbalance response characteristics for centrifugal pump, finite element analysis was performed according to the ISO 1940-1 standard. However, finite element analysis according to the ISO 1940-1 standard does not considering fluid flow effect. So, finite element analysis result and experimental results may be some differences. Vibration characteristics of RCP has affected by fluid flow effect induced from working fluid. Therefore, in order to understand vibration characteristics for the RCP shaft assembly considered in actual operating condition, rotor dynamic analysis should be performed considering the fluid flow effect. In this research, owing to accurately evaluate the vibration characteristics for the RCP considering hydro forces due to the fluid flow, we measured the bearing force and moment take into account the fluid-induced force. And then response spectrum analysis of RCP shaft assembly was performed considering fluid induced bearing radial forces which are measured values. Lastly, evaluate the vibration characteristics considering effect of fluid flow according to the number of revolution.

Finite element analysis of viscous fluid flow

1984 ◽  
Vol 12 (3) ◽  
pp. 217-233 ◽  
Author(s):  
G.A. Mohr
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fluid Flow ◽  
Viscous Fluid ◽  
Element Analysis ◽  
Viscous Fluid Flow

Finite element analysis of general fluid flow problems

1971 ◽  
Author(s):  
W. BOWLEY ◽  
J. PRINCE
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fluid Flow ◽  
Element Analysis ◽  
Flow Problems
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