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Figure 1  MHK Module.

MHK Devises Settings

MHK Devices – General Tab

In the Marine Hydrokinetics Device form, the General tab is shown in Figure 2, where the user can specify the power extracted from the flow. There are different methods for computing power extracted from flow, though currently only one method is enabled. The method is to use the specified thrust coefficient that is multiplied by velocity cubed. The user may specify the Velocity Source for Power Calculations required for computation of power. The available options are local cell velocity and upstream velocity.

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Figure 2  MHK Devices: General tab.

Device Parameters Tab

The Device Parameters tab is shown in Figure 3. Here the user specifies the number of MHK devices in the model by entering a number in the Number of MHK Device Type.  To set properties for each individual MHK device, the user can select each one from the Current Device Type drop-down box. The device names can be specified by the user, and for each device, the user must specify the device dimensions and a range of coefficients.  If the Use Device Settings checkbox is checked, the MHK will be displayed in the 3D View base on their settings. Guidance on how to determine these definitions can be found in the SNL user guide (James, 2010).

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Figure 3 MHK Devices: Device Parameters tab.

Device Locations

The Device Locations tab is where the user should specify the location for the devices. The user can enter I, J index, and Easting, Northing for the cell to specify locations manually. Type or copy and paste the device number which corresponds to that cell as shown in Figure 4851312658. Note that the Device Type column is defined in the Device Parameters tab previously. (e.g 1 or 2,. etc).

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Figure 6  Successful MHK Assignments.

Visualization Tab

The Visualization tab allows the setting of the linkage from the COLLADA files (*.dae) 3D object of the MHK devices to view in the 3D View as shown in Figure 7. Click on the Settings button on that form to set scale, rotation, and color for the 3D object as shown in Figure 8. Check on the box of The Change Object Color it allows changing the color for the object by selecting the color from the Object Color option, otherwise the color of the object will use the original color from the COLLADA files.

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