Numerical Simulation of Shock Compression of Liquid and Vaporous Water for Determining Conditions of Synthesis of Diamond from Graphite
L. V. Shurshalov
Dorodnitsyn Computing Centre, Russian Academy of Sciences, Moscow, 119333 Russia
Keywords: ударное сжатие, разгрузка воды в жидкой и парообразной фазе, корректировка уравнения состояния воды, синтез алмаза из графита, способы повышения температуры ударного сжатия, shock compression, unloading of water in a liquid and vapor phase, correction of the equation of state of water, synthesis of diamond from graphite, methods for increasing shock compression temperature
Abstract
Examples of calculating the shock compression of liquid water and water vapor using a slightly adjusted simplified Nigmatulin-Bolotnova equation of state of water are considered. The main attention is paid to the achievement of those numerical simulation parameters (primarily, water temperature) that may be useful for synthesizing diamond from graphite. It is shown that a favorable factor for achieving a required temperature is the shock compression of a preheated layer of liquid water. It seems even more promising to use a layer of heated water vapor instead of liquid water. In the latter case, reaching the required temperatures and pressures requires a significantly lower velocity of the impactor.
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