where δ(x − x0) is the delta function in 2D and adds the source at the point where (
x,
y) =
x = x0. The monopole amplitude
S (SI unit: N/m
2), the dipole moment vector
D (SI unit: N/m), and the quadrupole
d vector (SI unit: m) and
D vectors (SI unit: N/m) depend on the source type selected.
Select Flow to add an monopole point source located at
r = r0 defined in terms of the volume flow rate per unit length out from source
QS and the phase
of the source. The source defines the following monopole amplitude:
Select Intensity to define the source in terms of the free space reference RMS intensity
Irms it radiates. In a homogeneous medium, the specified intensity is obtained (the reference), but with other objects and boundaries present, the actual intensity is different. The source defines the following monopole amplitude:
where dsrc is the distance from the source where the intensity
Irms is specified and
is the phase of the source. Enter values or expressions for:
When Power is selected, specify the source’s reference RMS strength by stating the power per unit length it radiates. In a homogeneous medium, the specified power is obtained (the reference), but with other objects and boundaries present, the actual source power is different. The source defines the following monopole amplitude:
where Prms denotes the free space RMS reference power per unit length measured in W/m and
is the phase of the source. Enter values or expressions for:
Enter a user defined Quadrupole d vector,
d (SI unit: m), and a user defined
Quadrupole D vector,
D (SI unit: N/m).