open access

https://hdl.handle.net/2115/91737

Thermal analysis of a miniature magnetic fluid seal installed in an implantable rotary pump

英語

implantable medical device

2022-04-15

Elsevier

Journal of Magnetism and Magnetic Materials

548

168977

The capacity of a magnetic fluid (MF) seal is decreased by increased MF temperature. A cooling system for MF is limited in a miniature MF seal installed in an implantable rotary pump. MF temperature in an MF seal installed in an implantable rotary pump was studied. The temperature of MF in a rotary pump was measured in vitro. Also, steady-state thermal analyses were conducted for an implantable rotary pump model. The results showed that (1) the decrease in magnetization of an MF due to increased temperature is negligible when the heat transfer coefficient of the seal housing is greater than 500 W/(m2·K) and (2) the increased temperature is mainly due to heat flux from the motor, and the magnitude of temperature increase due to viscous friction in the MF is low. In conclusion, an MF seal can be used in an implantable rotary pump from the standpoint of heat characteristics.

学術雑誌論文

Accepted Manuscript

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