Realistic 3D Resistive MHD Calculations on the CRAY-1 PDF Download

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Realistic 3D Resistive MHD Calculations on the CRAY-1

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CPU times for nonlinear resistive MHD calculations are very strongly dependent on the input variables. Although some regions of parameter space can be studied very cheaply, the conditions that correspond to Tokamak plasmas are extremely time consuming to study. Unfortunately, it is not possible to extrapolate reliably from the easy cases to the interesting regime. In recent years we have improved the efficiency of our codes by two orders of magnitude. As a result it is now feasible for us to run some realistic Tokamak cases on a CDC 7600. An additional factor of four reduction in run time is obtained by going to the CRAY-1 where the most time consuming routines are vectorized. This last factor makes a program of systematic studies feasible.
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