Revert "check for tubes with inner radius of 0; set pressure drag to 0 and set a warning" This reverts commit 7676b9b674ffc268d8c67915b8e54f44d22449fa.
Revert "check for tubes with inner radius of 0; set pressure drag to 0 and set a warning" This reverts commit 7676b9b674ffc268d8c67915b8e54f44d22449fa.