Nx Siemens basic simple tutorial for Thermal simulation with Heat flux and
convection
CAD model: 2D small beam or fin is used thermal analysis.
basic commands are used as following: meshing,convection as constrain, load as
heat flux, with Nastran solver for thermal simulation or thermal analysis in
nx siemens.
Use the Through Thickness (Temperature and Gradient) option to define the temperature and gradient in the thickness direction for the element.
Use the Through Thickness (Top and Bottom) option to define temperatures for additional membrane stress calculation at the lower and upper surface of 2D elements.
Supported element types:
You can use the Through Thickness (Temperature and Gradient) and Through Thickness (Top and Bottom) option to define temperatures on the following types of 2D elements:
With the Through Thickness (Temperature and Gradient) option, you can use the Temperature at Element Reference Plane option to specify the temperature at the element’s reference plane.
In Nastran, you use the ZOFFS field on the element’s bulk data entry (such as CQUAD4 ) to define the offset distance from the surface of the element’s nodes to the element’s reference plane.
In Pre/Post, you use the Shell Offset option in the Mesh Associated Data dialog box to define this ZOFFS offset distance.
Specifying the temperatures at Z1 and Z2:
With the Through Thickness (Top and Bottom) option, you can use the Temperature at Z1 and Temperature at Z2 options to define the temperatures for an additional membrane stress calculation at points Z1 and Z2.
In Nastran, you use the Z1 and Z2 fields on the PSHELL bulk data entry to define the fiber distances that the software uses for these additional membrane stress calculations. By default, Z1 and Z2 are equal to one-half of the plate thickness. The positive direction is determined by the right-hand rule.
In Pre/Post, you use the Fiber Distance, Z1 and Fiber Distance, Z2 options in the PSHELL physical property table dialog box to define the fiber distances.
You can use the Through Thickness (Temperature and Gradient) and Through Thickness (Top and Bottom) option to define temperatures on the following types of 2D elements:
- CQUAD4
- CQUAD8
- CTRIA3
- CTRIA6
- CQUADR
- CTRIAR
With the Through Thickness (Temperature and Gradient) option, you can use the Temperature at Element Reference Plane option to specify the temperature at the element’s reference plane.
In Nastran, you use the ZOFFS field on the element’s bulk data entry (such as CQUAD4 ) to define the offset distance from the surface of the element’s nodes to the element’s reference plane.
In Pre/Post, you use the Shell Offset option in the Mesh Associated Data dialog box to define this ZOFFS offset distance.
Specifying the temperatures at Z1 and Z2:
With the Through Thickness (Top and Bottom) option, you can use the Temperature at Z1 and Temperature at Z2 options to define the temperatures for an additional membrane stress calculation at points Z1 and Z2.
In Nastran, you use the Z1 and Z2 fields on the PSHELL bulk data entry to define the fiber distances that the software uses for these additional membrane stress calculations. By default, Z1 and Z2 are equal to one-half of the plate thickness. The positive direction is determined by the right-hand rule.
In Pre/Post, you use the Fiber Distance, Z1 and Fiber Distance, Z2 options in the PSHELL physical property table dialog box to define the fiber distances.
How 2D thermal analysis works in Siemens Nx for beginner?