FlowMassUnit.java
package org.djunits.unit;
import org.djunits.quantity.Quantity;
import org.djunits.unit.scale.IdentityScale;
import org.djunits.unit.si.SIPrefixes;
import org.djunits.unit.unitsystem.UnitSystem;
/**
* The mass flow rate is the mass of a substance which passes through a given surface per unit of time (wikipedia).
* <p>
* Copyright (c) 2015-2024 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
* BSD-style license. See <a href="https://djunits.org/docs/license.html">DJUNITS License</a>.
* </p>
* @author <a href="https://www.tudelft.nl/averbraeck">Alexander Verbraeck</a>
*/
public class FlowMassUnit extends Unit<FlowMassUnit>
{
/** */
private static final long serialVersionUID = 20140607L;
/** The base, with "kg/s" as the SI signature. */
public static final Quantity<FlowMassUnit> BASE = new Quantity<>("FlowMass", "kg/s");
/** The SI unit for mass flow rate is kg/s. */
public static final FlowMassUnit SI = new FlowMassUnit().build(new Unit.Builder<FlowMassUnit>().setQuantity(BASE)
.setId("kg/s").setName("kilogram per second").setUnitSystem(UnitSystem.SI_BASE).setSiPrefixes(SIPrefixes.NONE, 1.0)
.setScale(IdentityScale.SCALE).setAdditionalAbbreviations("kg/sec"));
/** kg/s. */
public static final FlowMassUnit KILOGRAM_PER_SECOND = SI;
/** lb/s. */
public static final FlowMassUnit POUND_PER_SECOND =
KILOGRAM_PER_SECOND.deriveLinear(factorMD(MassUnit.POUND, DurationUnit.SECOND), "lb/s", "pound per second",
UnitSystem.IMPERIAL, "lb/s", "lb/s", "lb/sec");
/**
* Determine the conversion factor to the base flow mass unit, given a mass unit and a duration unit.
* @param mass MassUnit; the used mass unit, e.g. lb
* @param duration DurationUnit; the used duration unit, e.g. h
* @return double; the conversion factor from the provided units (e.g. lb/h) to the standard unit (e.g., kg/s)
*/
private static double factorMD(final MassUnit mass, final DurationUnit duration)
{
return mass.getScale().toStandardUnit(1.0) / duration.getScale().toStandardUnit(1.0);
}
}