// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
sci.sediment-transport-shields Calculator
Calculates the Shields parameter θ = τ/(ρs−ρ)gd for sediment transport initiation and compares to critical Shields value. For quartz sand in water: θ_critical ≈ 0.045 — above this threshold, bed load sediment transport begins; far above (θ > 0.3), suspension-dominated transport occurs.
Inputs
Tau Pa
Internal force per unit area (Pa or MPa). Must stay below yield strength in service.
D50 Mm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Rho S Kg M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Rho W Kg M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Results
Shields parameter θ
Reference formula or conversion factor shown for context.
critical Shields θ_cr
Reference formula or conversion factor shown for context.
transport regime
The operating regime — the mode or zone in which the system is currently operating.