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 WJM  Vol.2 No.1 , February 2012
Numerical Investigation of Flow Structure Interaction Coupling Effects in Hard Disk Drives
Abstract: This paper studies the flow structural interaction (FSI) within a hard disk drive (HDD) through the use of a novel coupling method. The interaction studied was the fluid induced vibration in the HDD. A two step coupling approach was used, where the fluid and structural components were solved sequentially. The result obtained was a ratio of 0.65 between the vibration amplitudes of a fixed head stack assembly (HSA) and a moving HSA. The ratio was next applied on a real 3.5 inch HDD, to allow the parameter to be further improved upon. A new benchmark index of 0.69 was developed from this. This parameter may allow future researchers to model the out of plane vibrations of a HSA easily, saving precious time. A 31% more accurate simulation of FSI within 3.5 inch HDD at 15000 rpm is achieved by the use of this new coupling method and benchmark index.
Cite this paper: nullE. Ng, Q. Teo and N. Liu, "Numerical Investigation of Flow Structure Interaction Coupling Effects in Hard Disk Drives," World Journal of Mechanics, Vol. 2 No. 1, 2012, pp. 9-18. doi: 10.4236/wjm.2012.21002.
References

[1]   R. Kral and E. Kreuzer, “Multibody Systems and Fluid- Structure Interactions with Application to Floating Structures,” Multibody System Dynamics, Vol. 3, No. 1, 1992, pp. 65-83. doi:10.1023/A:1009710901886

[2]   S. Badia and R. Codina, “On Some Fluid-Structure Iterative Algorithms Using Pressure,” International Journal for Numerical Methods in Engineering, Vol. 72, No. 1, 2007, pp. 46-71. doi:10.1002/nme.1998

[3]   Q. Zhang and T. Hisada, “Studies of the Strong Coupling and Weak Coupling Methods in FSI Analysis,” International Journal for Numerical Methods in Engineering, Vol. 60, No. 12, 2004, pp. 2013-2029. doi:10.1002/nme.1034

[4]   V. Sankaran, J. Sitaraman, B. Flynt and C. Farhat, “Development of a Coupled and Unified Solution Method for Fluid-Structure Interactions,” Springer, Berlin, 2009.

[5]   C. Liang, R. Kannan and Z. Wang, “A p-Multigrid Spectral Difference Method with Explicit and Implicit Smoothers on Unstructured Triangular Grids,” Computers and Fluids, Vol. 38, No. 2, 2009, pp. 254-265. doi:10.1016/j.compfluid.2008.02.004

[6]   R. Kannan and Z. Wang, “A Study of Viscous Flux Formulations for a p-Multigrid Spectral Volume Navier Stokes Solver,” Journal of Scientific Computing, Vol. 41, No. 2, 2009, pp. 165-199. doi:10.1007/s10915-009-9269-1

[7]   C. Bernardo and C. W. Shu, “The Runge-Kutta Discontinuous Galerkin Method for Conservation Laws V: Multidimensional Systems,” Journal of Computational Physics, Vol. 141, No. 2, 1998, pp. 199-224.

[8]   ANSYS Fluent Software, 2011. http://www.ansys.com/About+ANSYS

[9]   K. Aruga, M. Suwa, K. Shimizu and T. Watanabe, “A Study on Positioning Error Caused by Flow Induced Vibration Using Helium-Filled Hard Disk Drives,” IEEE Transactions on Magnetics, Vol. 43, No. 9, 2007, pp. 3750-3755. doi:10.1109/TMAG.2007.902983

[10]   N. Liu, Q. D. Zhang and K. Sundaravadivelu, “A New Fluid Structure Coupling Approach for High Frequency/ Small Deformation Engineering Application,” Asia-Pacific Magnetic Recording Conference, Singapore, 10-12 November, 2010, pp. 1-2.

[11]   J. Videler, “Fish Swimming,” Chapman & Hall, London, 1993. doi:10.1007/978-94-011-1580-3

 
 
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