EngiAtlas
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ENGIATLAS / FIELD INDEX 001

Read engineering as a connected system.

Trace every equation to its origin, its valid conditions and the concept it unlocks next. Fluid mechanics, indexed from fundamentals to practice.

PUBLISHED / 1MAPPED / 16JA + ENPRIMARY SOURCES / 3

Now mapping — Fluid Mechanics

Fluid mechanics knowledge map

Move left to right from describing a flow to analysis and design. Start anywhere, then trace back to every prerequisite.

01

Describe the flow

Name the flow and the quantities that describe it

What is a fluid?
Basic · 4 min○
Density, pressure & viscosity
Basic · 8 min○
Streamlines, pathlines & streaklines
Basic · 7 min○
Eulerian & Lagrangian views
Core · 9 min○
02

Write conservation laws

Turn mass, momentum and energy into equations

Continuity equation
Core · 12 minOpen →
Momentum conservation
Core · 14 min○
Bernoulli equation
Core · 11 min○
Navier–Stokes equations
Applied · 18 min○
03

Classify the flow

Identify dominant effects and choose approximations

Reynolds number
Core · 10 min○
Laminar & turbulent flow
Core · 12 min○
Boundary layers
Applied · 15 min○
Compressibility & Mach number
Applied · 13 min○
04

Apply in design

Measure, compute and make engineering decisions

Pipe losses
Applied · 16 min○
Pumps & piping systems
Applied · 17 min○
Drag & lift
Applied · 14 min○
Introduction to CFD
Applied · 20 min○

First learning path: the three conservation laws

Connect continuity, momentum and energy conservation in about 45 minutes.

Start with continuity →

From first insight to engineering use, in one article.

01

Grasp it in 30 seconds

Start with intuition and the conclusion. Know immediately whether this is the page you need.

02

Make equations usable

Symbols, units, derivation and conditions are separated so every approximation is explicit.

03

Never isolate knowledge

Prerequisites and next concepts are visible, keeping the learning path clear.

Editorial standard / v1.0

State what is verified—and what is not.

EngiAtlas shows evidence and verification status page by page instead of merely looking authoritative. This is a founding edition; independent expert review has not yet been completed.

SOURCE

Primary sources first

Direct links lead to traceable public sources such as NASA and NIST.

CHECK

Units and calculations checked

Worked examples and calculators are tested to reproduce the same result from the same inputs.

STATUS

Review status disclosed

Published, source-checked and independently reviewed are treated as different states.

Continuity equation: updated 2026-08-08 / 3 sources / independent review pending

Beyond fluid mechanics

Expansion roadmap

BuildingFluid mechanics
NextMechanics of materials
NextThermodynamics
PlannedDynamics
PlannedControl
PlannedDesign & manufacturing
PlannedCAE