Fluid mechanics is the study of liquids and gases at rest and in motion: the pressures they exert, how they flow, and the energy lost moving them. In a plant it sizes pipes, pumps, hydraulics and ventilation.
How to use these lessons: They teach methods, not answers to assigned problems. Work each example yourself first, then compare your steps with ours.
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The 2027 Engineer Edition planner — dated and undated, for classes, labs and projects.
A first course moves from fluids at rest to fluids in motion, then to the losses that real, viscous flows suffer. These lessons start with internal flow in pipes, the case most engineers meet first on the job.
Most pipe-flow problems follow one path: find the velocity, find the Reynolds number, pick the friction factor, then apply the energy equation. Keep units consistent, and use fluid properties at the operating temperature. The pipe pressure drop calculator shows every step so you can check your own work.
They are hard in different ways. Fluid mechanics leans more on calculus and on judging which simplifications apply; thermodynamics leans more on property tables and careful bookkeeping of energy.
Statics, basic dynamics and calculus. Some programmes take it alongside or after thermodynamics.
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