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Density in a Deforming Bar
Posted Apr 22, 2015, 12:44 a.m. EDT Chemical Reaction Engineering 1 Reply
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When I apply a force to a rectangular prism with one fixed end such that it deforms under tension, it appears that volume is not conserved. The bar lengthens, but there is no other visible deformation and the density across the structure appears to remain constant (when I do a volume plot of the density it remains constant). Does anyone know why Comsol doesn't appear to conserve mass in this case and what I must do to "convince" it to do so?
I have attached an example.
I have attached an example.
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1 Reply Last Post Apr 22, 2015, 2:12 a.m. EDT
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Posted:
10 years ago
Hi.
The following quote from the user's guide may be helpful:
"The variable solid.rho represents a “reference” or “initial” density ρ0, and not the “current” density ρ. If you are interested in finding the density of the deformed material (the density in the spatial frame), you can compute it using the expression solid.rho/solid.J."
Regards,
Henrik
The following quote from the user's guide may be helpful:
"The variable solid.rho represents a “reference” or “initial” density ρ0, and not the “current” density ρ. If you are interested in finding the density of the deformed material (the density in the spatial frame), you can compute it using the expression solid.rho/solid.J."
Regards,
Henrik