Unstructured triangular mesh generation techniques and a finite volume numerical scheme for slider air bearing simulation with complex shaped rails

1999 ◽  
Vol 35 (5) ◽  
pp. 2421-2423 ◽  
Author(s):  
L. Wu ◽  
D.B. Bogy
Keyword(s):  
Finite Volume ◽  
Mesh Generation ◽  
Numerical Scheme ◽  
Triangular Mesh ◽  
Air Bearing ◽  
Slider Air Bearing ◽  
Unstructured Triangular Mesh

A Fast Implicit Algorithm for Time-Dependent Dynamic Simulations of Air Bearing Sliders

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
Wei Hua ◽  
Shengkai Yu ◽  
Weidong Zhou ◽  
Kyaw Sett Myo
Keyword(s):  
Finite Volume Method ◽  
Finite Volume ◽  
Triangular Mesh ◽  
Time Dependent ◽  
Air Bearing ◽  
Dynamic Simulations ◽  
Unstructured Triangular Mesh ◽  
Simulation Results ◽  
Time Accuracy ◽  
Volume Method

An unstructured triangular mesh is successfully applied to the static simulations of air bearing sliders due to its flexibility, accuracy and mesh efficiency in capturing various complex rails and recess wall regions of air bearing surface, as well as fast simulation speed. This paper introduces a new implicit algorithm with second order time accuracy for the time-dependent simulations of the slider dynamics and available for the unstructured triangular mesh. The new algorithm is specially developed for the finite volume method. Since the algorithm has second order time accuracy, it provides the flexibility of applying various time steps while guaranteeing the numerical accuracy and convergence. Moreover, the unstructured triangular mesh is highly efficient and fewer nodes are used. Finally, due to the small variation of flying attitude between two neighboring time steps, it is especially efficient for iteration methods which are used in the finite volume method. As a result, the algorithm shows very fast speed in time-dependent dynamic simulations. Simulation studies are conducted on the flying dynamics of a thermal flying-height control slider after external excitations. The simulation results are compared with the simulation results obtained by the rectangular mesh based on the finite element method. It is observed that the simulation results are well correlated. The fast Fourier transform is also employed to analyze the air bearing frequencies. It is indicated that the new algorithm is of high efficiency and importance for time-dependent dynamic simulations.

Unstructured Adaptive Triangular Mesh Generation Techniques and Finite Volume Schemes for the Air Bearing Problem in Hard Disk Drives

2000 ◽  
Vol 122 (4) ◽  
pp. 761-770 ◽  
Author(s):  
Lin Wu ◽  
D. B. Bogy
Keyword(s):  
Finite Volume ◽  
Mesh Generation ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Triangular Mesh ◽  
Air Bearing ◽  
Disk Drives ◽  
Algebraic Equations ◽  
Finite Volume Schemes ◽  
Linear Algebraic Equations

Unstructured adaptive triangular mesh generation techniques and vertex based finite volume schemes that suit slider air bearing simulation of hard disk drives are constructed and implemented. Different refinement and adaptation techniques are used to generate several levels of good quality mesh over sliders with complex rail shapes. At each level, either one geometrical or one physical property of the problem is captured. A group of implicit vertex based finite volume schemes is first constructed. The resulting simultaneous linear algebraic equations are solved iteratively by the Gauss-Seidel method. Unconditional stability of the scheme is achieved. In addition, we present a non-nested full approximation storage (FAS) multi-grid algorithm that can significantly speed up the convergence rate of the implicit finite volume schemes. The steady state flying attitude is obtained by a quasi-Newton iteration method. [S0742-4787(00)01804-X]

A New Implicit Algorithm for the Simulations of Slider Dynamics Based on the Unstructured Triangular Mesh

2004 ◽  
Author(s):  
Wei Hua ◽  
Jianhua Li ◽  
Bo Liu ◽  
Yansheng Ma
Keyword(s):  
Triangular Mesh ◽  
Flying Height ◽  
Air Bearing ◽  
Implicit Algorithm ◽  
Rectangular Mesh ◽  
Unstructured Triangular Mesh ◽  
Simulation Results ◽  
Time Accuracy ◽  
Volume Method ◽  
D Model

The unstructured triangular mesh is successfully applied to the steady simulations of the slider due to its flexibility, accuracy and mesh efficiency in capturing various complex ABS rails and recess wall regions. This paper introduces a new implicit algorithm with second order time accuracy for the time-dependent simulations of the slider dynamics based on the unstructured triangular mesh. The new algorithm is specially developed for the unstructured triangular mesh and the finite volume method. It is applied to simulate the load/unload details based on the 9-D model, such as the influences of the limiter position on the flying height during the unload process, and the development and the 3-D profiles of the air bearing pressure during the load process. Because of the mesh efficiency of the unstructured triangular mesh and the flexibility of applying greater time steps, the simulation times are significantly shorter than those of the structured rectangular mesh. The simulation results based on the algorithm are in good correlation with the experimental results.

Multi-objective unstructured triangular mesh generation for use in hydrological and land surface models

2018 ◽  
Vol 119 ◽  
pp. 49-67 ◽  
Author(s):  
Christopher B. Marsh ◽  
Raymond J. Spiteri ◽  
John W. Pomeroy ◽  
Howard S. Wheater
Keyword(s):  
Mesh Generation ◽  
Land Surface ◽  
Triangular Mesh ◽  
Land Surface Models ◽  
Multi Objective ◽  
Surface Models ◽  
Unstructured Triangular Mesh
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