A core element of Visiometa consists of the completely new calculation approach of the local solidification module. Completely based on geometry and in real time, at any time and automatically, after the user has made a geometrical, or process technical change. This is made possible by the also completely new discretisation (mesh generation) of the geometries.
What is the solidification module?
Basically, the module is the quotient of the volume and the surface of a body. However, transferring this relationship to the solidification module is a challenge. Only for a sphere this is easily possible, because everything that describes a ball depends only on the radius of the ball and the proportionality between content and surface of the ball is therefore always given. In addition, the heat dissipation conditions at each point of the sphere are identical, provided that the expansion of the environment is the same everywhere.
Even with a prism, this is no longer the case. At the edges and especially in the area of the corners, the heat can flow off more quickly because there is more surface available for the heat flow for a partial volume of the prism. Here it becomes clear that there is a close connection between the solidification modulus and the solidification time. This realisation is not new, Chvorinov already described this correlation in the forties of the last century.
Visiometa's completely new numerical calculation approach enables the reliable calculation of the local solidification modulus even within a complex geometry. For the first time a geometric, analytical and thus very fast calculation of the solidification modulus is available to the foundryman. On this basis, the Visiometa user can develop a resilient casting concept within a very short time.
The corners and edges of a casting mold heat up disproportionately during the solidification of the casting material. This effect is also expressed on a geometric level by the Visiometa calculation principle. This provides the basis for an efficient and goal-oriented design of the casting. The aim is controlled solidification and thus a technically dense casted matrix.
Also new within the numerical approach of Visiometa is the so-called multiblock strategy of discretization (mesh generation). This means that only the locally affected cells have to be recalculated for each mesh change during planning. The smaller the number of elements to be calculated, the faster the result is available.
Even the target-oriented processing of very complex parts is thus possible for the user in hardly perceptible calculation times.