bfillery
Mechanical
- Oct 27, 2006
- 38
Hi All
I was wndering if anybody could answer the following. I am performing a transient heat transfer analysis, and wish to include the influence of a thin film surface coating on the thermal conduction which has a significantly lower conductivity. I am modelling the heat transfer via a surface convection, and wish to model the coating with axisymmetric shells and the bulk material as a 2D axisymmetric body. Therefore I 'tie' a shell surface to a solid surface. However, I have discovered that for a heat conduction problem, this only works of there is 1 integration point specified through the shell thickiness. If this is the case, there is no conductivity through the shell, and therefore no temperature gradient through the shell, resulting in a step change at the shell solid interface proprotional only to the convection, and not the shell conductivity as well. I summise the requirement for 1 intgration point is such that ABAQUS knows which nodal temperature value to 'tie' to the solid (as the number of nodal temps that are possible through a heat transfer shell is equal to the number of integration points). Does anybody know how to get around this problem without modelling the coating with continuum elements.
Thanks
Brent Fillery
I was wndering if anybody could answer the following. I am performing a transient heat transfer analysis, and wish to include the influence of a thin film surface coating on the thermal conduction which has a significantly lower conductivity. I am modelling the heat transfer via a surface convection, and wish to model the coating with axisymmetric shells and the bulk material as a 2D axisymmetric body. Therefore I 'tie' a shell surface to a solid surface. However, I have discovered that for a heat conduction problem, this only works of there is 1 integration point specified through the shell thickiness. If this is the case, there is no conductivity through the shell, and therefore no temperature gradient through the shell, resulting in a step change at the shell solid interface proprotional only to the convection, and not the shell conductivity as well. I summise the requirement for 1 intgration point is such that ABAQUS knows which nodal temperature value to 'tie' to the solid (as the number of nodal temps that are possible through a heat transfer shell is equal to the number of integration points). Does anybody know how to get around this problem without modelling the coating with continuum elements.
Thanks
Brent Fillery