Darcy's law
Darcy's law relates the flow rate of a fluid through a porous medium to permeability and the pressure gradient.
At a glance
Key signals
33% cross fields · reaches 1 more
- Petroleum Engineering
- Explanation
- Examples
- Misconception
- Sourced relations
- Attribution
Dependencies
What this concept builds on and what it makes possible — derived from the atlas’s dependency, causal and structural relations, not from every related edge.
Foundations · builds on
Darcy's lawdepends onPermeabilityEstablished
Darcy's law depends on Permeability.
Mechanism: Flow rate is proportional to permeability in Darcy's equation.
Enables · leads to
Reservoir simulationdepends onDarcy's lawEstablished
Reservoir simulation depends on Darcy's law.
Structural role & consequence
Interpreted from the current atlas graph — what the connections mean, not just how many there are.
33% of its relationships cross field boundaries, reaching 1 other discipline — unusual in a discipline where most concepts stay within their field.
structural · Structural graph analysis — not a claim of importance, causation or history.
Currently dark in the atlas: no key date stored · 3 of 3 of its relations lack claim-level evidence.
atlas representation · Describes the current Thinking OS representation, not the state of the world.
Builds on 1 foundation (requires / depends-on / derived-from / emerges-from).
structural · Structural graph analysis — not a claim of importance, causation or history.
Structural neighbourhood: 3 → 12 → 22 concepts reachable within 3 hops.
structural · Structural reach — being reachable is not the same as being understood.
cross-field
2 within-field, 1 cross-field
Strengths & constraints
Constraints
- Evidence coverage currently thin in the atlas — few of its relationships carry claim-level evidence. atlas representation
- No dated history stored — the atlas records no key date for this concept. atlas representation
Conditions
- Its dependency reading rests on 1 foundation relation. structural
- Read structurally — most of its relationships carry no external evidence yet, so claims here are graph-derived. structural
Dependency radial
What this concept builds on (left) and what it makes possible (right) — derived from dependency and causal relations.
What builds on this
1 concept build on this directly, 1 in total, across 1 discipline.
Structural downstream reach along dependency edges — not a claim of historical necessity.
Seen through each discipline
How this concept sits in each of its fields — derived from its real connections in the graph, not asserted.
Through this lens it connects to Permeability and Reservoir simulation.
Related ideas to explore
Concepts that look related but are not yet connected here — candidates for a connection to reason about, not established links.
This idea also appears in…
The same structure shows up in other disciplines. These are real recurrences drawn from the graph — a starting point for asking “what carries over, and what changes?”
Concepts
- Fluid FlowFluid Dynamics
crosses a discipline boundary
- Connects 3 other ideas across 1 discipline.
- Most of its connections are of the “Dependency” kind.
Derived from the graph’s real structure — observations, not a score.
Sources
- Modification of Darcy's law for the threshold pressure gradient (1999) verified
- Chapter 4 Darcy's Law and Applications (1978) verified