Package jline.solvers.fluid

Class FluidInterp

java.lang.Object

jline.solvers.fluid.FluidInterp

public final class FluidInterp
extends Object

Clamped piecewise-linear interpolation of a vector-valued trajectory.

This is the shared time-varying-input evaluator of the fluid solver, used both by the trajectory-based iteration (TBI) transient, which reads the frozen complement trajectory of a cell, and by the time-varying rate multiplier of the closing ODE (FluidRateMultiplier). It mirrors MATLAB fluid_interpcols.m, transposed to the row-major (one row per time point) layout used throughout the Java fluid code: MATLAB samples a quantity in the columns of a matrix, here each row y[j] is the sample at time t[j].

Times outside [t[0], t[n-1]] are clamped to the boundary rows (zero-order hold outside the grid).

Method Summary

Modifier and Type	Method	Description
static double[]	interp(double[] t, double[][] y, double tq, int dim)	Interpolates the trajectory (t, y) at time tq.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

interp

public static double[] interp(double[] t,
 double[][] y,
 double tq,
 int dim)

Interpolates the trajectory (t, y) at time tq.

Parameters:

t - strictly increasing time grid, length n

y - n rows of dimension at least dim, row j sampled at t[j]

tq - query time

dim - number of components to return

Returns:

the interpolated (clamped) row, of length dim