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To find the temperature at the wall, click on insert >> location >> point, and name it Tw exit. In the Details of Tw exit window, set Method to XYZ and enter 8.64, 0.06, 0. Click Apply to create a point at the upper right corner of the pipe. Click on Expression right below and right click in the window to create a new expression named Tw. Under Details of Tw panel, enter probe(Temperature)@Tw exit in the Definition tab. Tw now gives the temperature at the location (8.64, 0.06, 0), which is on the exit pipe wall.
!point.jpg Image Added

To find the mean temperature at a given location in the pipe, click on insert >> location >> line, and name it exit. In the Details of exit window, set Method to Two Points and enter (8.64, 0, 0) for Point 1 and (8.64, 0.06, 0) for Point 2. Click Apply to create a line at the exit of the pipe. The mean temperature is the area weighted average temperature and we can use integral to find the appropriate mean Temperature:

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