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Verlet One Position Step Tool

Position Verlet with constant acceleration over the current time step.

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Description

Return one position-Verlet update.

A simulation update combines supplied states, fluxes, forces and time conventions. Local integration and interface terms can be evaluated independently, while a full solver must also supply consistent fields, boundary conditions, conservation and convergence behavior.

Return one position-Verlet update.

When to use this tool

Use Verlet One Position Step when checking one explicitly supplied integration, flux or lattice-population contribution.

How to use the tool and how it works

  1. Enter currentPosition, previousPosition, acceleration, step. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read nextPosition. Use the output convention below.

Return one position-Verlet update. Require step > 0; nextPosition = 2*currentPosition-previousPosition+acceleration*step².1

Input fieldMeaning and unitsAccepted input
currentPositionCurrent PositionRequired. Finite number.
previousPositionPrevious PositionRequired. Finite number.
accelerationAccelerationRequired. Finite number.
stepStep duration or increment under the stated convention.Required. Finite number; strictly above 0.
Output fieldInterpretationReturned shape
nextPositionNext PositionRequired. Finite number.
json
{
  "input": {
    "currentPosition": 2,
    "previousPosition": 1,
    "acceleration": 3,
    "step": 0.5
  },
  "output": {
    "nextPosition": 3.75
  }
}

Limitations and assumptions

  • Acceleration is supplied at the step's stated state; this is not a full simulation or a stability/accuracy guarantee.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Use and validate the complete numerical method with its state initialization, boundary conditions and physical model for a reliable simulation.

References

  1. Calculation and input contract: computational-physics/verlet-one-position-step — tool.io

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