Numerical Simulation of the Natural Convection in Horizontal Enclosure of Different Aspect Ratio with an Array of Square Cylinder

사각 물체가 존재하는 밀폐계의 종횡비 변화에 따른 내부 자연대류 현상에 대한 수치적 연구

The physical model considered here is a horizontal layer of fluid heated below and cooled above with a periodic array of evenly spaced square cylinders placed at the center of the layer, whose aspect ratio here varies from unity to twelve. Periodic boundary condition is employed along the horizontal direction to allow for lateral freedom for the convection cells. Two-dimensional solution for unsteady natural convection is obtained using an accurate and efficient Chebyshev spectral multi-domain methodology for a given Rayleigh numbers of $10^{6}$.