Solid Works

10/30/10

   A solid Works design of the inner and outer annulus tank for climate change analysis.

10/05/10

      For the laboratory experiment, we are in the process of building a sloping bottom for the rotating  tank. The sloping bottom, when inserted to the existing tank, will allow a variation of the depth of fluid with “latitude”. This will then allow a more realistic generation of “Rossby waves’ in the tank. Such waves are commonly observed in Earth’s atmosphere. They are relevant to the regulation of climate variability at higher latitudes.  We have finished the design of the sloping bottom and submitted it to ASU’s research machine shop.  It will be made of a metal sheet, similar to the existing inner cylinder of the rotating tank. A new set of experiments will be conducted with the rotating tank plus a sloping bottom.  If schedule allows, the outcome of those experiments will be compared to the experiments without a sloping bottom as well as the numerical simulations using Fluent.

Figure1. Solid works model of sloping bottom

Mass properties of Slope_1060_Aluminum

Output  coordinate System:

Density = 0.10 pounds per cubic inch

Mass = 21.12 pounds

Volume = 216.48 cubic inches

Surface area = 379.90 inches^2

Center of mass: ( inches )

    X = 0.00

    Y = -2.47

    Z = 0.00

Principal axes of inertia and principal moments of inertia: ( pounds * square inches )

Taken at the center of mass.

     Ix = (0.00, 0.00, 1.00)       Px = 212.63

     Iy = (1.00, 0.00, 0.00)       Py = 212.63

     Iz = (0.00, 1.00, 0.00)       Pz = 399.98

Moments of inertia: ( pounds * square inches )

Taken at the center of mass and aligned with the output coordinate system.

    Lxx = 212.63    Lxy = 0.00    Lxz = 0.00

    Lyx = 0.00    Lyy = 399.98    Lyz = 0.00

    Lzx = 0.00    Lzy = 0.00    Lzz = 212.63

Moments of inertia: ( pounds * square inches )

Taken at the output coordinate system.

    Ixx = 341.39    Ixy = 0.00    Ixz = 0.00

    Iyx = 0.00    Iyy = 399.98    Iyz = 0.00

    Izx = 0.00    Izy = 0.00    Izz = 341.39

Figure2. Solid works model of sloping bottom.

Mass properties of Slope_1060_Aluminum

Output  coordinate System:

Density = 0.10 pounds per cubic inch

Mass = 13.36 pounds

Volume = 136.99 cubic inches

Surface area = 522.54 inches^2

Center of mass: ( inches )

    X = 0.00

    Y = -2.56

    Z = 0.00

Principal axes of inertia and principal moments of inertia: ( pounds * square inches )

Taken at the center of mass.

     Ix = (0.00, 0.00, 1.00)       Px = 164.74

     Iy = (1.00, 0.00, 0.00)       Py = 164.74

     Iz = (0.00, 1.00, 0.00)       Pz = 309.37

Moments of inertia: ( pounds * square inches )

Taken at the center of mass and aligned with the output coordinate system.

    Lxx = 164.74    Lxy = 0.00    Lxz = 0.00

    Lyx = 0.00    Lyy = 309.37    Lyz = 0.00

    Lzx = 0.00    Lzy = 0.00    Lzz = 164.74

Moments of inertia: ( pounds * square inches )

Taken at the output coordinate system.

    Ixx = 252.13    Ixy = 0.00    Ixz = 0.00

    Iyx = 0.00    Iyy = 309.37    Iyz = 0.00

    Izx = 0.00    Izy = 0.00    Izz = 252.13