In this paper, we present a technique for visualizing a large-scale irregular volume dataset that is generated from an LES-based CFD simulation. Since our computational mesh was too large for a single computational node, it was divided into multiple regions; moreover, the resulting file was comprised of various irregular volume datasets. In order to cope with the multiple volume datasets, we extended our particle-based volume rendering (PBVR) technique so to fit the distributed computing environment. We applied our distributed PBVR technique to an LES-based CFD simulation, which explores dental fricative sound sources in order to confirm the effectiveness of the technique.