Use the Heat Source feature to add a domain heat source that generates sound. Add this node from the
More submenu. If a fluid is heated and cooled rapidly, thermal expansion and contraction will generate acoustic waves. This could be a source representing a pulsating laser beam or another general heat source. For a flame source in a combustion simulation use the
Flame Model. The feature adds a monopole domain source to the right-hand side defined as
where the (isobaric) coefficient of thermal expansion αp is defined in terms of the speed of sound
c, heat capacity at constant pressure
Cp, ambient temperature
T (this value is taken from the
Model Input section and can be space dependent), and ratio of specific heats
γ.
The Model Input section is always visible in the
Heat Source feature as the ambient temperature
T is always needed to compute the coefficient of thermal expansion.
Enter the additional fluid properties necessary to define the heat source. Enter the Heat capacity at constant pressure Cp (SI unit: J/(kg·K)) and the
Ratio of specific heats γ (dimensionless). The default for both is
From material. Select
User defined to enter a value or expression directly.
