Download High performance computing and the discrete element model : by Gao-Feng Zhao PDF

By Gao-Feng Zhao

This e-book addresses the excessive functionality computing of the Discrete aspect version (DEM). it's a finished presentation of parallel implementation of the DEM on 3 well known parallel computing systems; the multi-core computer, the GPU laptop, and the cluster supercomputer. that includes accompanying MatLab resource this e-book is helping you enforce the DEM version to be used with excessive acting know-how, for specific implementation of the dynamic failure of solids, granular circulation and pressure wave propagation via solids.

  • Features either Pre-processor, Solver, and Post-processor for the DEM
  • Covers the parallel implementation of DEM at the cluster, multi-core computer, GPU computer
  • Full of examples of dynamic fracturing, granular move and pressure wave propagation utilizing excessive functionality DEM
  • Source codes and information documents on hand for hands-on practice

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Extra info for High performance computing and the discrete element model : opportunity and challenge

Example text

The tension, friction and cohesion of the wall are set to zero. Two cases are modeled: the elastic collision (viscous coefficient is zero) and the viscous– elastic collision (viscous coefficient = 1e − 4 s). 29 shows the ball position at different times predicted using DICE2D. The ball will bounce back when it hits the wall; therefore, the wall element is properly implemented. 29(a)). It can be concluded that the energy balance is satisfied for the P2W contact in DICE2D. 28. 9. 29. 29(b). An exact match is obtained.

However, from the energy analysis beyond the collision points, energy equilibrium is still satisfied. Therefore, the implementation of the P2P contact treatment in DICE2D is still correct. 27(b)). 26. 8. 27. 8. Bounce back ball In this example, the implementation of the W2P contact is checked. 28. It is a modified version of the falling ball problem. The ball will first be assigned with an initial velocity of 30 m/s. It will first fly to the peak point and then fall down under the effects of gravity, eventually bouncing back again.

The simulation results are controlled by Newton’s second law of motion, which must be implemented correctly in the DEM code. Therefore, the example is the best candidate to check the implementation of the calculation core of a DEM code. It is suggested that such an example should be tested for any newly developed DEM code. 2. 2 20,000 10 24 High Performance Computing and the Discrete Element Model The computational model has only one particle. 2. 15 shows the simulation results using DICE2D. As expected, the ball falls down under the effect of gravity.

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