i modeled a mass diffusion problem with abaqus using mass diffusion step and heat transfer as an element type.the problem that i have a coupling between temperature and mass diffusion so i tried to define temperature in predefined field. Unfortunately there is no gradient temperature inside the material. The temperature stays just at surfaces. if someone can help me i will be grateful. Regards,
Comment by Composite Analytica on 06 Apr 2016 at 22:58:15
If there is no temperature gradient, the boundary conditions inside and outside should be the same.
Besides, we use CheFEM prologue to determine the mass and temperature transfer...for gas, fluid driven expansion and permeation of polymers and composites....precision is much higher.