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modelling elatic-water interface in Solid Mechanics model
Posted 28 mai 2013, 12:39 UTC−4 Fluid & Heat, Structural Mechanics Version 4.2a 0 Replies
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I am trying to model a cylindrical phantom which is placed in water under acoustic radiation force.
The acoustic radiation force is loaded as a 'body load' which works fine. However my problem is how do I treat the 'water' in my elastic model. I tired to create a 'psudo water' by setting the Poisson's ratio really high and Young's modulus really low (so that longitude wave speed is 1500m/s and shear wave speed is very small). This works fine in 2D. However as I extend the model to 3D, the mesh requirement increased and I cannot afford the computational cost any more.
My question is, in Comsol, is there a type of boundary condition I can make use of to place around the my elastic phantom so that I can omit the large water domain out side it ? My water is static.
If not is there any alternatives ?
Thank you
Ning
Hello Ning Zhang
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