PRE-EXPERIMENTAL NUMERICAL SIMULATION OF THE QUASI-ISENTROPIC COMPRESSIBILITY OF DEUTERIUM AND HELIUM IN REGION OF HIGH PRESSURES USING THE LEGAK CODE
A. O. Blikov, M. A. Mochalov, E. V. Shuvalova, E. A. Bakulina, E. A. Pronin
VANT. Ser.: Mat. Mod. Fiz. Proc 2022. Вып.2. С. 40-52.
The paper presents results of the numerical simulation with the LEGAK code for the deuterium and helium compression in the region of pressures up to 12 TPa and densities up to 11 g/cm3, which was performed prior to the obtainment of experimental results. Problem setups for simulations correspond to the three types of experimental designs used for recording of the quasi-isentropic compressibility of gases and their mockups, in which kinematic parameters of the motion of shell boundaries are recorded. Main objectives of the numerical study prior to experiments are the calculation of gas compression parameters, including those which cannot be measured in experiments, and optimization, if necessary, of experimental setup for such experiment to be efficiently conducted.Results of the pre-experimental numerical simulation are compared with results of subsequent experiments. A good agreement between them allows expanding the LEGAK code application for a new class of problems and using LEGAK results to optimize the procedure of experimentally recording the quasi-isentropic compressibility parameters of gases. Keywords: helium, deuterium, compressibility, a two-stage spherical device, 2D problem simulations, the LEGAK code.
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English
