A new, local-adaptive, grid-generating algorithm is developed and integrated with the multigrid control volume method to simulate the steady flying state of the air bearing sliders in hard disk drives (HDDs) accurately and efficiently. Local finer meshes (mesh dimension decreases to half) are created on the nodes of the current finest grids that have pressure gradients or geometry gradients larger than a predefined tolerance after the pressure distribution has been obtained on the initial uniform mesh. In this way, the pressure- or geometry-sensitive regions have higher resolution, leading to more accurate results without inefficiently larger meshes. Two sliders are used to demonstrate the applicability of this method. It is found that this new, local-adaptive, grid-generating method improves the stability and efficiency of the simulation scheme.
A Local Adaptive Multigrid Control Volume Method for the Air Bearing Problem in Hard Disk Drives
Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received August 14, 2012; final manuscript received January 31, 2013; published online March 28, 2013. Assoc. Editor: Dae-Eun Kim.
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Li, L., and Bogy, D. B. (March 28, 2013). "A Local Adaptive Multigrid Control Volume Method for the Air Bearing Problem in Hard Disk Drives." ASME. J. Tribol. July 2013; 135(3): 032001. https://doi.org/10.1115/1.4023804
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