Cylindrical Anisotropic thermal conductivity

Feroz

Hello, 

I have a hollow cylindrical pipe 100mm long, and 35mm in diameter.

Running up the pipe in the axial direction the thermal conductivity is 30 W/m.K and radially the thermal conductivity is 70 W/m.K

I would've thought implementing this to be quite simple but I am struggling. For the cylindrical anisotropic settings, there is a 2x3 matrix. What would be the input for this?

I am using a half-cylinder. Locating centre and axis help buttons do not seem to be working. 

Any help would be appreciated, many thanks in advance. 

acupro

The cylindrical center is any point through which the axis passes.

You're most likely interested in the top row of the six-element array, which are k11, k22, and k33.  These correspond to the typical r, theta, z components for a cylindrical definition.  k11 is the radial conductivity, k22 is the azimuthal conductivity, and k33 is the axial conductivity.

You'll probably first need to create a point somewhere on the axis of the half-cylinder. In the Geometry ribbon, the pull-down under Create allows you to create a point.  It should snap automatically to the center of a plane/circle - maybe try the center of one of the 'disk' planes to the left in your image.

Then you should be able to use that to define the cylindrical center in the conductivity panel.

The axis vector may be a little more tricky in the GUI.

We will revisit this for future versions.

Feroz

Do i want the plane to slice like this? or do i want it at the base of the cylinder. The desirable orientation is not made clear. 

acupro

Feroz said:

Do i want the plane to slice like this? or do i want it at the base of the cylinder. The desirable orientation is not made clear. 

I would expect that position/orientation to be fine.  Just make sure the center and axis make sense once you're out of that tool.  The center can be anywhere on the axis.