calculator
Hydraulic Diameter Calculator
Compute hydraulic diameter, cross-sectional area, wetted perimeter, and geometry interpretation for internal CFD passages.
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CFD calculators and setup helpers for flow regimes, wall treatment, pressure loss, and solver preparation.
CFD tools focus on preprocessing checks and engineering interpretation for flow simulations, including hydraulic diameter, Reynolds number, Darcy friction factor, pressure drop, turbulence intensity, wall y-plus, and first-cell-height workflows.
7 tools
Published calculator entries in this category.
Compute hydraulic diameter, cross-sectional area, wetted perimeter, and geometry interpretation for internal CFD passages.
Compute Reynolds number for internal hydraulic-diameter workflows or external/general characteristic lengths.
Compare Colebrook, Haaland, and Swamee-Jain turbulent friction-factor methods with laminar and transitional warnings.
Compute segment pressure drop with direct or calculated Darcy friction factor and CFD geometry inputs.
Estimate CFD inlet turbulence intensity from direct RMS fluctuation, Reynolds number, or low/medium/high presets.
Compute y plus using friction velocity, wall shear, Darcy friction factor, or skin-friction coefficient modes.
Compute wall-to-cell-centre distance and full first-layer height using y+, viscosity, friction velocity, and cell-centre fraction.
The category includes hydraulic diameter, Reynolds number, Darcy friction factor, pressure drop, turbulence intensity, wall y-plus, and first-cell-height calculations.
Internal-flow wall effects depend on the boundary in contact with the fluid, so hydraulic diameter uses four times flow area divided by wetted perimeter for non-circular passages.
Treat it as a ratio of inertial to viscous effects and apply regime thresholds only when they match the geometry, flow type, and correlation being used.
The Darcy factor used by the category's pipe-loss workflow is four times the Fanning factor; mixing the conventions produces a fourfold pressure-loss error.
No. The calculator covers Darcy-Weisbach major loss and entered minor-loss coefficients, not pumps, elevation, cavitation, transients, phase change, or unlisted fittings.
A target y-plus, viscosity, density, and estimated wall shear determine the wall-normal first-cell location used for preliminary inflation-layer planning.
No. They support setup estimates and independent checks; mesh convergence, conservation, solver settings, turbulence modeling, and validation remain separate responsibilities.
Review fluid properties, characteristic length, roughness, flow regime, geometry, wall treatment, correlation range, and whether the case is steady, transient, internal, or external.
CFD Tools support preliminary fluid-regime, wall-treatment, pressure-loss, mesh, time-step, and solver-preparation decisions. They do not execute or validate a computational fluid dynamics simulation.
Define geometry, fluid properties, reference scales, and modelling objective; estimate the relevant dimensionless or setup quantity; then test mesh, domain, boundary-condition, and solver sensitivity in validated CFD software.
Simplified correlations and setup estimates depend on flow regime, property evaluation, geometry, turbulence treatment, and boundary conditions. Convergence residuals alone do not establish physical accuracy.