viernes, 24 de enero de 2014

martes, 22 de enero de 2013

Computer simulation ( definition)

A computer simulation, a computer model, or a computational model is a computer program, run on a single computer, or a network of computers, that attempts to simulate an abstract model of a particular system. Computer simulations have become a useful part of mathematical modeling of many natural systems in physics (computational physics), astrophysics, chemistry and biology, human systems in economics, psychology, social science, and engineering. Simulation of a system is represented as the running of the system's model. It can be used to explore and gain new insights into new technology, and to estimate the performance of systems too complex for analytical solutions.[1]



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FEM Solutions


Example of 2D mesh
FEM mesh created by an analyst prior to finding a solution
 to a magnetic problem using FEM software. Colours
indicate that the analyst has set material properties for
 each zone, in this case a conducting wire coil in
 orange; a ferromagnetic component (perhaps iron)
in light blue; and air in grey. Although the geometry
 may seem simple, it would be very challenging to
calculate the magnetic field for this setup without FEM
software, using equations alone.




FEM solution to the problem at left, involving a cylindrically
shaped magnetic shield. The ferromagnetic cylindrical
 part is shielding the area inside the cylinder by diverting
the magnetic field created by the coil (rectangular area
 on the right). The color represents the amplitude of the
magnetic flux density, as indicated by the scale in the
 inset legend, red being high amplitude. The area inside
the cylinder is low amplitude (dark blue, with widely
spaced lines of magnetic flux), which suggests that the
 shield is performing as it was designed to.
FEM_example_of_2D_solution











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