Patent ID: 9646119
Date: 2017-05-09
CPC Classifications: G06F

Claim:
1. A computer-implemented method for determining sound wave movement through at least one porous material in or on a physical or mechanical device, the method comprising: modeling the at least one porous material as a first volumetric fluid region, in a simulation space, in which fluid flows and sound waves travel through the at least one porous material and dissipate via a momentum sink that accounts for pressure and acoustic losses of the at least one porous material modeled in the simulation space; wherein the momentum sink that is modeled removes one or more amounts of momentum at a plurality of volumetric locations within the first volumetric fluid region representing the at least one porous material to model acoustical losses in the at least one porous material; simulating, in a simulation space, fluid flow and propagation of sound waves in a first volumetric fluid region representing the at least one porous material, the activity of the fluid being simulated so as to model movement of elements within the first volumetric fluid region and using a first model having a first set of parameters that comprises a parameter for the momentum sink; obtaining, based on using the momentum sink in simulating fluid flow and propagation of sound waves in the first volumetric fluid region representing the at least one porous material, (i) pressure losses and (ii) acoustical losses in the at least one porous material; simulating, in the simulation space, fluid flow and propagation of sound waves in a second volumetric fluid region representing a portion of the physical or mechanical device, the second volumetric fluid region adjoining the first volumetric fluid region representing the at least one porous material in the simulation space, the activity in the second volumetric fluid region being simulated so as to model movement of elements within the second volumetric fluid region and using a second model having a second set of parameters; and modeling, based on the simulations, fluid flow and propagation of sound waves in (i) the first volumetric fluid region representing the at least one porous material, (ii) the second volumetric fluid region representing the portion of physical or mechanical device, and (iii) between the first and second volumetric fluid regions in the simulation space to model fluid flow and propagation of sounds waves in the system.