Boundary Layer Thickness Calculator

Calculate boundary layer thickness δ: laminar δ = 5x/√Re_x, turbulent δ = 0.37x/Re_x^0.2. Displacement thickness δ* = δ/3 (laminar). Friction coefficient Cf. Transition at Re_x ≈ 5×10⁵.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How to Use

Enter the values for the patient or scenario you are assessing. Calculate boundary layer thickness δ: laminar δ = 5x/√Re_x, turbulent δ = 0.37x/Re_x^0.2. Displacement thickness δ* = δ/3 (laminar). Friction coefficient Cf. Transition at Re_x ≈ 5×10⁵. Use the boundary layer result to inform your clinical assessment.

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Frequently Asked Questions