Clast Terminal Velocity Lithic
Balance spherical-clast buoyant weight against caller constant quadratic drag and report Reynolds number for applicability review; not a Stokes viscous law, nonspherical drag solver or hazard trajectory.
Description
A settling clast reaches terminal speed when buoyant weight balances drag.
A settling clast reaches terminal speed when buoyant weight balances drag. A constant quadratic-drag coefficient represents a chosen flow regime.
Balance spherical-clast buoyant weight against caller constant quadratic drag and report Reynolds number for applicability review; not a Stokes viscous law, nonspherical drag solver or hazard trajectory.
When to use Clast Terminal Velocity Lithic
Use this tool to balance spherical-clast buoyant weight against caller constant quadratic drag and report Reynolds number for applicability review; not a Stokes viscous law, nonspherical drag solver or hazard trajectory.
Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.
How to use Clast Terminal Velocity Lithic and understand its results
- Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.
- Enter clastDiameterM, clastDensityKgPerM3, fluidDensityKgPerM3, gravityMPerSecondSquared, constantDragCoefficient, fluidDynamicViscosityPaSeconds using the field table and calculation rules, then run the tool.
- Read terminalSettlingSpeedMPerSecond, modelReynoldsNumber. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| clastDiameterM | Clast diameter m | number | Required |
| clastDensityKgPerM3 | Clast density kg per m3 | number | Required |
| fluidDensityKgPerM3 | Fluid density kg per m3 | number | Required |
| gravityMPerSecondSquared | Gravity m per second squared | number | Required |
| constantDragCoefficient | Constant drag coefficient | number | Required |
| fluidDynamicViscosityPaSeconds | Fluid dynamic viscosity Pa seconds | number | Required |
Use positive diameter, densities, gravity, drag coefficient and fluid viscosity, with the clast denser than fluid. Report speed and Reynolds number for applicability review.1
speed = sqrt(4(ρclast − ρfluid)diameter × gravity/(3ρfluid × drag coefficient)) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| terminalSettlingSpeedMPerSecond | Terminal settling speed m per second | number |
| modelReynoldsNumber | Model reynolds number | number |
{
"input": {
"clastDiameterM": 0.01,
"clastDensityKgPerM3": 2000,
"fluidDensityKgPerM3": 1,
"gravityMPerSecondSquared": 10,
"constantDragCoefficient": 1,
"fluidDynamicViscosityPaSeconds": 0.001
},
"output": {
"terminalSettlingSpeedMPerSecond": 16.3258486252119,
"modelReynoldsNumber": 163.25848625211898
}
}Limitations and assumptions
Spherical constant-drag settling excludes Stokes-law solving, shape changes and hazard trajectories.
Numbers and computed results must be finite; overflow produces an error. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Pumice Density Floating Checker: Model pore-water uptake at fixed pumice envelope volume and report a signed neutral-buoyancy fill fraction; values outside [0,1] identify unreachable thresholds, not an invented flotation guarantee. For a complementary task, use Ballistic Ejection Max Range: Optimize vacuum ballistic range over launch angle onto a lower horizontal impact plane; distinct from existing fixed-angle/equal-level projectile motion, and aerodynamic drag/terrain or safe distances are not predicted.
References
-
Clast Terminal Velocity Lithic — tool.io
Similar or alternative tools
- Pumice Density Floating Checker
Model pore-water uptake at fixed pumice envelope volume and report a signed neutral-buoyancy fill fraction; values outside [0,1] identify unreachable thresholds, not an invented flotation guarantee.
- Ballistic Ejection Max Range
Optimize vacuum ballistic range over launch angle onto a lower horizontal impact plane; distinct from existing fixed-angle/equal-level projectile motion, and aerodynamic drag/terrain or safe distances are not predicted.