numerical simulation History of engineering & technology 41 Technology: general issues 23 mechanical properties 8 CFD 7 concrete 7 computational fluid dynamics 6 machine learning 6 microstructure 6 compressive strength 5 heat transfer 5 modeling 5 numerical analysis 5 simulation 5 sustainability 5 PIV 4 aspect ratio 4 finite element method 4 heat exchanger 4 high temperature 4 multiphase flow 4 numerical calculation 4 numerical modeling 4 porosity 4 roughness 4 stability 4 turbulence 4 additive manufacturing 3 artificial neural network 3 boundary layer 3