Unsteady Analysis of a Mechanical Seal Using Duhamel’s Method

2004 ◽  
Author(s):  
Richard F. Salant ◽  
Bin Cao
Keyword(s):  
Thermal Analysis ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Numerical Experiment ◽  
Auxiliary Function ◽  
Empirical Approach ◽  
Mechanical Seal ◽  
Element Analysis ◽  
Semi Empirical

An unsteady numerical model of a mechanical seal, with mixed lubrication, has been developed. The thermal analysis is performed using Duhamel’s method is combination with a numerical experiment to determine Duhamel’s auxiliary function. The results using this semi-empirical approach compare well with those from a finite element analysis. The model has been used to predict the performance of a mechanical seal during startup and shutdown.

Unsteady Analysis of a Mechanical Seal Using Duhamel’s Method

2004 ◽  
Vol 127 (3) ◽  
pp. 623-631 ◽  
Author(s):  
Richard F. Salant ◽  
Bin Cao
Keyword(s):  
Thermal Analysis ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Numerical Experiment ◽  
Auxiliary Function ◽  
Mixed Lubrication ◽  
Mechanical Seal ◽  
Element Analysis ◽  
Semiempirical Approach

An unsteady numerical model of a mechanical seal, with mixed lubrication, has been developed. The thermal analysis is performed using Duhamel’s method in combination with a numerical experiment to determine Duhamel’s auxiliary function. The results using this semiempirical approach compare well with those from a finite element analysis. The model has been used to predict the performance of a mechanical seal during startup and shutdown.

Simulation of Nine-Spacer Nozzle’s Flow Field of Al Roll-Casting Using Coupled Fluid-Thermal Finite Element Analysis

2010 ◽  
Vol 159 ◽  
pp. 697-702
Author(s):  
Ying Zhou ◽  
Ya Xi Tan
Keyword(s):  
Thermal Analysis ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Flow Field ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Cooling Capacity ◽  
Element Analysis ◽  
Roll Casting ◽  
Element Simulation

A three-dimensional coupled fluid-thermal finite element simulation model has been developed to provide analyzing distribution of velocity and temperature of nine-spacer nozzle by using FEM simulation of FLOTRAN module in ANSYS 6.0. To explore fluid-thermal analysis of the flow fields of nine-spacer nozzle of aluminum roll-casting, stricter analysis of postprocessing result was conducted by MATLAB. It was concluded that flow field of nine-spacer nozzle was able to match cooling capacity of cast rollers, but nine-spacer nozzle’s geometric flaw didn’t suit for working in the case of speed increasing of the drawing-sheet and thickness reducing of the aluminium sheet during roll casting.

Modeling the Static Behaviour of a Double Curvature Brickwork Vault

2010 ◽  
Vol 133-134 ◽  
pp. 367-372 ◽  
Author(s):  
Anna Anzani ◽  
Paola Condoleo ◽  
Antonia Gobbo ◽  
Alberto Taliercio
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Safety Assessment ◽  
Crack Pattern ◽  
Element Analysis ◽  
3D Finite Element ◽  
Double Curvature ◽  
Static Behaviour ◽  
Hollow Bricks

For safety assessment, a double curvature hollow bricks cloister vault with lunettes has been studied. Its geometry, constructive aspects, crack pattern have been surveyed and a 3D finite element analysis has been carried out, the numerical model exploiting the accurate survey of the vault geometry.

scholarly journals NUMERICAL SIMULATION ON JOINING OF CERAMICS WITH METAL BY FRICTION WELDING TECHNIQUE

2013 ◽  
Vol 22 ◽  
pp. 190-195 ◽  
Author(s):  
N. RAJESH JESUDOSS HYNES ◽  
P. NAGARAJ ◽  
S. JOSHUA BASIL
Keyword(s):  
Numerical Simulation ◽  
Thermal Analysis ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Distribution ◽  
Friction Welding ◽  
Transient Liquid Phase ◽  
Sheet Thickness ◽  
Welding Process ◽  
Element Analysis

The joining of ceramic and metals can be done by different techniques such as ultrasonic joining, brazing, transient liquid phase diffusion bonding, and friction welding. Friction Welding is a solid state joining process that generates heat through mechanical friction between a moving workpiece and a stationary component. In this article, numerical simulation on thermal analysis of friction welded ceramic/metal joint has been carried out by using Finite Element Analysis (FEA) software. The finite element analysis helps in better understanding of the friction welding process of joining ceramics with metals and it is important to calculate temperature and stress fields during the welding process. Based on the obtained temperature distribution the graphs were plotted between the lengths of the joint corresponding to the temperatures. To increase the wettability, aluminium sheet was used as an interlayer. Hence, numerical simulation of friction welding process is done by varying the interlayer sheet thickness. Transient thermal analysis had been carried out for each cases and temperature distribution was studied. From the simulation studies, it is found that the increase in interlayer thickness reduces the heat affected zone and eventually improves the joint efficiency of alumina/aluminum alloy joints.

Thermal analysis of the intact mandibular premolar: a finite element analysis

2013 ◽  
Vol 46 (9) ◽  
pp. 841-846 ◽  
Author(s):  
I. Z. Oskui ◽  
M. N. Ashtiani ◽  
A. Hashemi ◽  
H. Jafarzadeh
Keyword(s):  
Thermal Analysis ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis

A Semi-Empirical Method for Estimating the Effective Leak and Vent Areas of an Airbag

1999 ◽  
Author(s):  
Aloysius U. Anagonye ◽  
J. T. Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Air Permeability ◽  
Empirical Method ◽  
Test Apparatus ◽  
Element Analysis ◽  
Test Setup ◽  
Surface Areas ◽  
Semi Empirical ◽  
Fabric Specimen

Abstract A semi-empirical method that utilizes tests from a small fabric specimen to quantify the effective leak and vent areas of an entire airbag is developed in this paper. The test setup and procedure used in the airbag material coupon tests are similar to the standard method used in determining air permeability of fabrics. A test apparatus for measuring the deflection of the fabric coupon was devised. Finite element analysis is used to compute the expanded vent and airbag surface areas of the coupon under various deformations. The leak and vent models were developed based on the results of a regression analysis. The effective vent area of a fabric coupon is a function of the ratio of the pressures across the fabric and the expanded vent area. Similarly, the effective leak area of a fabric coupon is a function of the ratio of the pressures across the fabric and the expanded surface area. The tested airbag materials were characterized with these models for use with finite element airbag models.

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