**Introduction to CFD Modeling Guidelines**

The field of computational field dynamics (CFD) has seen tremendous advancement in recent decades, riding on the back of the phenomenal advances in computational science and power.**Geometric Sensitivity**

This section discusses and illustrates the effects of the geometrical representation of the problem, and the discretization of the geometry on your CFD solution.**Mesh Sensitivity**

This section illustrates the various effects that mesh refinement, mesh quality and topology have on your CFD solution.**Boundary Condition Sensitivity**

This section discusses and illustrates the effects of the location of your model boundaries and the boundary conditions you apply on your CFD solution.**Physical Model Sensitivity**

This section discusses and illustrates the effects of the mathematical models you choose to represent the problem physics, flow type, material properties, and so on, in your problem.**Convergence Sensitivity**

This section discusses and illustrates the effects of the level of convergence tolerance you provide to the solver, and also stresses on the need to look for other solution parameters before accepting a solution.**Conclusion**

The modeling aspects described in this section are by no means complete for all of the flow simulations that can be imagined. This discussion is intended only to convey some of the common sources of variability among CFD model results.**References**