Direct Numerical Simulation of MHD Turbulent Flows with High-Pr Heat Transfer

*The large-scale direct numerical simulations (DNS) of a Magneto-Hydro-Dynamics (MHD) turbulent heat transfer have been executed on massively parallel processing supercomputer systems. The maximum computational speed was measured up 5.28 Tflops and the sufficiently parallelization efficiency by using up to over thousands CPUs was achieved. The DNS results were in good agreements with the previous experimental data and we proposed new MHD heat transfer equation: Nu/NuHa=0 = 1-5.5 N, where Nu is the Nusselt number, Ha is the Hartman number and N is the interaction parameter. Definitely, we can succeed to establish the DNS data of MHD heat transfer under the high-Re (= 14,000) and the wide-range Prandtl number conditions (Pr = 0.025-25).