Comparison Between Eulerian and Lagrangian Methods to Predict Brownout Clouds

In this work, brownout simulations using both Lagrangian and Eulerian frames of reference are presented. The work compares results between these two methods and with experimental results. The numerical models used for the carrier and dispersed phases are presented along with the obtained results. Then, follows a description of the simulations performed for brownout clouds around aircraft at different flight configurations. Different flight configurations involve several thrust coefficients, taxiing speeds and the presence of the fuselage. Finally, analyses have been conducted on the influence on the computational efficiency of Eulerian and Lagrangian approaches, and the two models are compared in terms of parallel efficiency. Results show that Eulerian model can be more affordable in terms of computational cost.