Boundary layers 61 Boundary conditions 40 Boundary layer flow 34 Grain boundaries 25 article 19 Numerical methods 18 Atmospheric thermodynamics 16 Heat transfer 16 Reynolds number 16 human 16 Ordinary differential equations 15 Shear flow 15 Metal insulator boundaries 14 Turbulence 14 Friction 13 Humans 13 Similarity transformation 13 boundary condition 12 Boundary value problems 11 Finite difference method 11 Finite element method 11 Turbulent flow 11 boundary layer 11 Magnetohydrodynamics 10 Nanofluidics 10 Two-dimensional 10 Grain-boundaries 9 Nonlinear equations 9 Turbulent boundary layers 9 Kinetics 8