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Friction Loss ची गणना कशी करावी

Friction Loss म्हणजे काय?

Friction loss (pressure drop) in pipes and ducts represents energy loss. It's critical for pump and fan sizing.

सूत्र

Hazen-Williams: hf = (10.67×L×Q^1.85) / (C^1.85×D^4.87)
L
L value — Variable used in the calculation
Q
Q value — Variable used in the calculation
C
C value — Variable used in the calculation
D
D value — Variable used in the calculation

चरण-दर-चरण मार्गदर्शक

  1. 1Hazen-Williams: hf = (10.67×L×Q^1.85) / (C^1.85×D^4.87)
  2. 2Darcy-Weisbach: hf = f×(L/D)×(V²/2g)
  3. 3Results show required head or fan power

Worked Examples

इनपुट
PVC pipe (C=150), Q=0.05 m³/s, D=50 mm, L=100 m
परिणाम
hf ≈ 10-12 m head loss
Significant energy requirement

Common Mistakes to Avoid

  • Neglecting minor losses (fittings, valves)
  • Using wrong friction coefficients for pipe age

Frequently Asked Questions

How does diameter affect friction loss?

Loss inversely proportional to D^5 (or D^4.87); doubling diameter reduces loss 32×.

What is dynamic viscosity's role?

At low Reynolds numbers (laminar), viscosity dominates friction. At high (turbulent), roughness dominates.

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