Articles posted by Karim Kelfoun

# Author: Karim Kelfoun

## Numerical simulations of volcanic flows

Dense pyroclastic flows Dense / dilute pyroclastic flows and exchanges Debris avalanches Mud Flows Lava flows All the simulations are done witth the code VolcFlow VolcFlow web site to download the code, examples and for user help         Modélisation de l'avalanche de Socompa (Chili) Modélisation des écoulements pyroclastiq...

## Real-time measurement of the volcanic activity

Avec les soutien de l'ANR (projet Domerapi), de l'OPGC et du LabEx ClerVolc, nous développons des systèmes d'observation en continu et en temps réel de l'activité volcanique. La cible choisie est le volcan Merapi en Indonésie. Ce volcan est très actif, très peuplé et désormais équipé d'un réseau wifi qui permet de communiquer en temps réel avec les stations installées sur ses flancs comme à son...

## 4. VolcFlow as a script

It is possible to use VolcFlow as a script if you need to run several simulation, in a probabilistic approach for example. Here, lava source conditions are defined randomly. Simulation are done and data are saved. At the end, a map is generated. Red color = affected by all the simulations, blue = by just one. This example shows: - how to use VolcFlow as a script - how to use the data for ...

## 5. Tsunami

Simulation of a tsunami This example also shows how to use a image to define the initial thickness. You MUST use the double upwind scheme for tsunami simulation (doubleUpwind = 1 - a simple scheme would smooth the results). download the image here and add it in the same folder than the input file :  Input file : %A simple example to simulate a collapse in 2D %basic instructi...

## 2. Collapse

This example simulates the collapse of a mass, which is initially square shaped. The plastic rheology has been chosen. The artificial topography is defined with a mathematical function. initial shape                                                                                                         final shape Copy/paste these lines in the editor of Matlab. Save the .m-file, run Vol...

## 1. Dambreak

%A simple example to simulate a dambreak in 1D %basic instruction to write a VolcFlow file nrow = 3;   %equations are in 2D. At least 3 lignes (or columns) should be defined, even for 1D simulation ncol = 500; %number of column of the simulation dx_horiz = 3/ncol;   %defines the space step (in m) as a function                      %of the domain length and the number of cell...