Introduction -- Physical Phenomena Involved In Flows Of Fresh Cementitious Materials -- Introduction -- Is Concrete A Discrete Or A Continuum Material? -- Macroscopic Rheological Behavior -- Multi-Scale Approach -- Particle Interactions -- Stability And Static Segregation -- Dynamic Segregation And Granular Blocking -- Fiber Orientation And Induced Anisotropy -- Thixotropy And Transient Behavior -- Behavior At The Walls -- References -- Computational Fluid Dynamics -- Introduction To Computational Fluid Dynamics -- Material Behaviour Law -- Solving A Fluid Problem -- Analytical Solutions -- Numerical Solution -- Simulation Of Fresh Cementitious Materials -- References -- Simulation Of Fresh Concrete Flow Using Discrete Element Method (Dem) -- Introduction -- Discrete Element Method -- Simulating Concrete Flow Using Dem -- Calibration And Verification -- Industrial Applications -- Future Perspectives -- Summary -- Rerefences -- Numerical Errors In Cfd And Dem Modeling -- Introduction -- Basics Of Cfd – Understanding The Source Of Errors -- Numerical Errors (E1) -- Coding Errors (E2) -- User Error (E3) -- Error From Input Uncertainties (U1) -- Physical Model Uncertainty (U2) -- Sources Of Numerical Error In Dem Simulations -- References -- Advanced Methods And Future Perspectives -- Introduction -- Case Studies -- References.