TY - GEN

T1 - Numerical simulation of tungsten melting under fusion reactor-relevant high-power pulsed heating

AU - Lazareva, Galina G.

AU - Arakcheev, Aleksey S.

AU - Vasilyev, Aleksey A.

AU - Maksimova, Anastasia G.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Surface melting of tungsten under exposure to a pulsed electron beam was simulated numerically, the evaporation process taken into account. The calculation is based on the experimental time dependence of the total beam power. The model of the tungsten heating process is based on solving the two-phase Stefan problem. The position of the phase boundary depends on discontinuous nonlinear coefficients. The aim of the study is to provide a detailed resolution of the heat flow deep into the material with a fine spatial grid step. As compared with the size of the tungsten plate, the heating depth is very small. The problem statement under consideration is multiscale. Further expansion of the model involves gas dynamics equations to simulate the dynamics of the liquid and gaseous phases of the metal. Two approaches to solving the equation for temperature are considered: the implicit run method and the explicitly solvable Konovalov-Popov model. The results of calculations correlate with the experimental data obtained at the experimental stand Beam of Electrons for materials Test Applications (BETA) at Budker Institute of Nuclear Physics (BINP) of the SB RAS.

AB - Surface melting of tungsten under exposure to a pulsed electron beam was simulated numerically, the evaporation process taken into account. The calculation is based on the experimental time dependence of the total beam power. The model of the tungsten heating process is based on solving the two-phase Stefan problem. The position of the phase boundary depends on discontinuous nonlinear coefficients. The aim of the study is to provide a detailed resolution of the heat flow deep into the material with a fine spatial grid step. As compared with the size of the tungsten plate, the heating depth is very small. The problem statement under consideration is multiscale. Further expansion of the model involves gas dynamics equations to simulate the dynamics of the liquid and gaseous phases of the metal. Two approaches to solving the equation for temperature are considered: the implicit run method and the explicitly solvable Konovalov-Popov model. The results of calculations correlate with the experimental data obtained at the experimental stand Beam of Electrons for materials Test Applications (BETA) at Budker Institute of Nuclear Physics (BINP) of the SB RAS.

KW - Melting

KW - Numerical simulation

KW - Pulsed heating

UR - http://www.scopus.com/inward/record.url?scp=85060753653&partnerID=8YFLogxK

U2 - 10.1007/978-3-030-06228-6_5

DO - 10.1007/978-3-030-06228-6_5

M3 - Conference contribution

AN - SCOPUS:85060753653

SN - 9783030062279

T3 - Smart Innovation, Systems and Technologies

SP - 41

EP - 51

BT - Smart Modeling for Engineering Systems - Proceedings of the Conference 50 Years of the Development of Grid-Characteristic Method

A2 - Favorskaya, Alena V.

A2 - Jain, Lakhmi C.

A2 - Favorskaya, Margarita N.

A2 - Simakov, Sergey S.

A2 - Jain, Lakhmi C.

A2 - Jain, Lakhmi C.

A2 - Petrov, Igor B.

A2 - Jain, Lakhmi C.

PB - Springer Science and Business Media Deutschland GmbH

T2 - International Conference on 50 years of the development of grid-characteristic method, GCM50 2018

Y2 - 31 March 2018 through 3 April 2018

ER -