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KMID : 1144120150050030213
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Biomedical Engineering Letters
2015 Volume.5 No. 3 p.213 ~ p.220
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Numerical simulation of capillary deformation of a body implantable device
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Choi Deok-Kee
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Abstract
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Purpose: As ageing population over the world grows rapidly, more implantable devices need to get involved and developed to be used as reliable biocompatible replacements, substitutes, biosensors or patient-specific drug delivery systems. Thanks to fast-growing biomedical technologies, the devices made of metals, polymers, ceramics, or gels are being developed for the use of various purposes helping doctors and patients to find better solutions in coping with health problems. In the present study, the deformation of an implantable device made of polymers is calculated numerically owing to the capillary force by the interaction between the device and surrounding body fluid.
Methods: The total energy, which consists of the bulk energy and the surface energy, undergoes a minimization process which results in variational equations to be solved with finite element method.
Results: Three different models made of polymers for implantable devices to be immersed in a fluid where the surface tension prevails are considered. The simulation result clearly shows that the edges of the models get rounded owing to the surface tension interacting between the device and the surrounding fluid.
Conclusions: The numerical simulation via finite element method shows a glimpse of how much capillary effect may cause deformation when an implantable device once it is immersed. It is expected that the present study may be utilized to earn good attention for design of safer implantable device.
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KEYWORD
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Implantable device, Capillary effect, Capillary deformation, Surface energy, Finite element analysis
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