Numerical modelling of 3D convection in the Earth mantle

Numerical modeling of 3D convection in the upper mantle of the Earth beneath lithosphere of central Asia

“…In the present work, we carried out modeling of thermal convection beneath the Asia intercontinental region that includes the West Siberian plate, Siberian platform, central Asia folded zone, Tarim, and part of the North Chinese platform. This study extends and develops works [15][16][17][18][19].…”

“…Thus, the fluid motion, i.e., the velocity field, was calculated outside the lithosphere. The results were obtained with the mathematical model in the Cartesian coordinates, using the vorticity-vector potential variables [19]. The Rayleigh number characterizing the convection regime was chosen as Ra = 272, 000, which corresponds to current conceptions on conditions and interiors of the Earth.…”

“…The influence of such variations of the lithosphere thickness on the character of mantle flows is strong [17,28], hence, they are important for numerical modeling of 3D convection flows in the Earth mantle. Numerical modeling that is represented in many studies (see, e.g., [17][18][19][20] and references therein) makes it possible to construct thermal and velocity fields beneath the mentioned structures. Authors of [15][16][17][18][19] have constructed and minutely tested a numerical model of thermal convection in the Earth mantle, which is based on vorticity-vector potential variables, fractional step method, sequence of meshes, and Richardson extrapolation.…”

“…Numerical modeling that is represented in many studies (see, e.g., [17][18][19][20] and references therein) makes it possible to construct thermal and velocity fields beneath the mentioned structures. Authors of [15][16][17][18][19] have constructed and minutely tested a numerical model of thermal convection in the Earth mantle, which is based on vorticity-vector potential variables, fractional step method, sequence of meshes, and Richardson extrapolation. A 3D numerical model of convection in the upper mantle of the Earth, which is based on the implicit method of splitting in physical processes, was proposed in [20].…”

Tectonic depressions on the East-European and Siberian platforms: numerical modeling of convection beneath the Eurasian continent

“…При выборе основных параметров задачи в системе СИ, пригодных для верхней мантии (23), число Рэлея равно 4×10 5 : R=6370000 м, d=670000 м, ∆T=1800 °C, =10 -6 м 2 /с, =2⋅10 -5 °С, ρ 0 =3300 кг/м 3 , (28) g z =10 м/с 2 , η 0 =1.01871⋅10 21 кг/(м⋅с). Обезразмеренная вязкость мантийного вещества задавалась, как и в работе [Tychkov et al, 2005а]:…”