Introduction: Technical applications of CFD, overview of simulation methods, finite volume method, CFD analysis workflow. Boundary conditions: The role of boundary conditions, numerical implementation. Parameterization of boundary conditions, inlet, outlet, and further boundary conditions. Source terms and jump conditions. Turbomachinery modeling. Turbulence: The origin of turbulence, the characteristics of turbulent flows, turbulent scales. Mixing length model, Reynolds-averaged models, scale resolution models. Meshing: Element types. Element size and quality requirements. Reduction of numerical diffusion, wall boundary layers. Generation of hexahedral, tetrahedral, and polyhedral meshes, peculiarities of mesh types. Modeling of thermal processes: Selection of the density model, wall boundary conditions, determination of the heat transfer coefficient with numerical models. Heat exchanger models. Natural flows, pressure boundary conditions. Thermal radiation modeling. Error estimation: Error or Uncertainty? Verification, calibration, validation. CFD approximation system, error estimation, methods to improve accuracy.