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GATE 2020 CE (CE1) – Question 22

Geotechnical Engineering · Permeability and seepage: flow nets, uplift pressure, piping, capillarity · 1 mark · Multiple choice

Darcy’s law makes velocity proportional to the first power of hydraulic gradient. It applies to ______.

  1. laminar flow in porous media
  2. transitional flow in porous media
  3. turbulent flow in porous media
  4. laminar as well as turbulent flow in porous media

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Show answer and explanation

Correct answer: (A) laminar flow in porous media

Explanation

Darcy’s law v=ki assumes the linear viscous-flow regime in the pore network,typically laminar flow. At higher flow rates,inertial effects introduce nonlinear resistance. **Answer:A**.