.Buildings.Fluid.Storage.BaseClasses.ThirdOrderStratifier

Information

This model reduces the numerical dissipation that is introduced by the standard first-order upwind discretization scheme which is created when connecting fluid volumes in series.

The model is used in conjunction with Buildings.Fluid.Storage.Stratified. It computes a heat flux that needs to be added to each volume of Buildings.Fluid.Storage.Stratified in order to give the results that a third-order upwind discretization scheme (QUICK) would give.

The QUICK method can cause oscillations in the tank temperatures since the high order method introduces numerical dispersion. There are two ways to reduce the oscillations:

Both approaches are implemented in the model.

The model is used by Buildings.Fluid.Storage.StratifiedEnhanced.

Limitations

The model requires at least 4 fluid segments. Hence, set nSeg to 4 or higher.

Contents

NameDescription
MediumMedium model

Revisions


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