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Graetz Number

The Graetz number is a dimensionless number that characterizes laminar flow in a conduit.

The Graetz number equals the product of the specific heat capacity, diameter, characteristic length, characteristic speed and the mass density divided by the thermal conductivity and length.

Formula

QuantityVariable["Gz", "GraetzNumber"] == (QuantityVariable["c", "SpecificHeatCapacity"]*QuantityVariable["d", "Diameter"]*QuantityVariable["l", "Length"]*QuantityVariable["v", "Speed"]*QuantityVariable["ρ", "MassDensity"])/(QuantityVariable["k", "ThermalConductivity"]*QuantityVariable["L", "Length"])

symbol description physical quantity
Gz Graetz number "GraetzNumber"
c specific heat capacity "SpecificHeatCapacity"
d diameter "Diameter"
k thermal conductivity "ThermalConductivity"
l characteristic length "Length"
L length "Length"
v characteristic speed "Speed"
ρ mass density "MassDensity"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Graetz Number"]
Out[1]=

Get the formula:

In[2]:=
FormulaData[ResourceObject["Graetz Number"]]
Out[2]=

Use some values:

In[3]:=
FormulaData[ ResourceObject[ "Graetz Number"], {QuantityVariable["k","ThermalConductivity"] -> Quantity[1, ("Watts")/("KelvinsDifference" "Meters")]}]
Out[3]=

Publisher Information