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iTurbo

by Torbjorn Sjogren more by this developer →

#573,321 of 725,769 by ratings on Apple · #55,783 of 72,908 in Education

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Category: Education

Description

This application performs a Direct Numerical Simulation (DNS) where the Navier-Stokes equations are solved for two dimensional incompressible homogeneous turbulence. These equations are a set of nonlinear partial differential equations. The time stepping is performed with a simple Euler method where the time step is calculated so that the CFL number does not exceeds the given number (should be less than 0.8 otherwise the simulation blows up). The equations are solved in the Fourier space where the calculation of the nonlinear term transforms to a simple multiplication. The main CPU usage is consumed by transforming the vorticity field back and fourth between the Normal space where the time-stepping is performed and the Fourier space where the nonlinear term is calculated.

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History

Tracking since 09/05/2026. History accumulates as changes are observed — check back soon.