Surface models Trimming

The reflection of carbon atoms and ions at the limiter or divertor surfaces in the ERO modeling is determined by TRIM [29], However, the binary collision approximation used in the TRIM code is no longer valid at small energies of the incoming particles where chemical effects start to influence the interaction of the particles with the solid. To take this into account reflection coefficients calculated with a molecular dynamic code MolDyn [55] were implemented. 

D CAD/modeler Free-form surfaces, parametric geometry, trim curves, surface/material properties, assembly information Tessellation (static dynamic), data reduction (LOD), siuface properties — > textures, materials, reflection mapping... 

Closed boundaries of surfaces are automatically defined using topology and curve information from the curve network model. Surfaces are generated then trimmed by closed boundaries. Standard NURBS surfaces are applied for this purpose. The... 

For thin-film resistors the heat diffusion into the substrate is dominant for aU but extremely short pulses. The effective heat capacity is proportional to the surface area thus, large resistors here ako are at an advantage. Breakdown usually occurs at spots where the current density is high, for instance at the end of trimming groove. Irregularities in the film may compHcate matters even more. Nevertheless, it k possible to make mathematic models of the pulse behavior of such resistors that accurately predict the maximum allowed pulse power under specified conditions. An example of such a calculated curve is given in Fig. 2.23. 

Let s evaluate the value of the additional bending moments caused by the water pressure to the dipped part of the deck. The task will be narrowed down to the simplest scheme of the beam lying on the resilient bed. It is evident that -(1/5-5-1/4) part of the hull dipped into water doesn t lie on such bed. Then the analytic model will be seen according to Figure 5a, where there is a hull part dipped into water, P -the total pressure to the deck achieved while the horizontal and vertical flow. The trim angle was a=30° in the horizontal surface which corresponds to a real vessel pitching. 

---