PUFF LAGRANGIAN METHOD FOR SIMULATING THE VOLCANIC ASH DISPERSION Mutia Delina (a*), Tangguh Sudiro Oktafiandariento (a), Riser Fahdiran (a)
a) Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta. Jl. Rawamangun Muka No 1, Jakarta Timur 13220, Indonesia.
*mutia_delina[at]unj.ac.id
Abstract
Volcanic ash was dangerous for aviation because it could ruin the plane engine. This study built a simulation of volcanic ash dispersion by combining the PUFF and Lagrangian methods. These combination methods gave a better result because it included the advection, diffusion, and sedimentation vector, the geographic factor, wind area, eruption time and duration, lifetime particle in the air. The simulation was done by calculating the area ratio (AR) and the angular deviation (α). The simulation results were also compared with the satellite image from Volcanic Ash Advisory. The result showed that these combination methods were able to model the volcanic ash dispersion with a high-resolution image.
