Learn
ENGINEERING CONCEPTS, EXPLAINED
Fluid mechanics
Topic page →- AerodynamicsAerodynamics is how air flows around a body and the forces it makes. Lift and drag, the speed regimes and a worked wing example.
- Drag coefficientThe drag coefficient says how much drag a shape makes for its size and speed. The formula, typical values for common shapes and a worked car example.
- Navier–Stokes equationsThe Navier–Stokes equations describe how a viscous fluid moves. What each term means, a worked pipe-flow example and how CFD solves them.
- Reynolds numberThe Reynolds number predicts whether a flow is laminar or turbulent. The formula, which length to use, thresholds for pipes and plates and a worked example.
Structures and solid mechanics
Topic page →- Stress–strain curveHow to read a stress–strain curve, from the elastic region to yield strength, ultimate strength and fracture, with typical values for common metals.
- Von Mises stressVon Mises stress turns a 3D stress state into one number to compare with yield. The formulas, a worked shaft example, Tresca and when not to use it.
Heat transfer
Topic page →- Heat exchangersA heat exchanger moves heat between two fluids without mixing them. The main types, why counterflow wins and how to size one with LMTD.
- Heat transferHeat moves by conduction, convection and radiation. The equation for each, conductivity of common materials and a worked electronics cooling example.