Simple Solutions That Work! Issue 17

38 Contact: DAVID C. SCHMIDT [email protected] Once the unrigged simulation is complete, the Riser Design Wizard takes the solidification time data and converts it to thermal modulus. This is more accurate than the traditional geometric modulus, since it accounts for the dynamics of the process. Feeding Area Analysis The modulus information is scanned to determine where areas separate into distinct feeding areas. In this example, three areas are identified. By plotting low modulus values, we can see the feeding areas themselves, as shown in Figure 3. By plotting high modulus values, we can see the last points to freeze on each zone, which are the desired riser connection points, as shown in Figure 4. Riser Size Calculation Each riser size can then be calculated, using data from the unrigged simulation, including feeding area volume and thermal modulus, as shown in Figure 5. Finally, the risers can be added to the geometric model, so that a comprehensive feeding simulation can be done. The risered model is shown in Figure 6. Figure 3. Feeding Area Locations. Figure 4. Riser Attachment Points (High Modulus). Figure 5. Riser Size Calculator. Figure 6. Risered Model. Sizes and Locations Determined by the Riser Design Wizard.