# MATLAB CFD code If you want to do a fluid dynamics simulation in MATLAB® or write a CFD solver in MATLAB®, just download our QuickerSim CFD Toolbox for MATLAB®. Then, you can both easily solve fluid mechanics problems or write and modify your codes. Go to the CFD Toolbox for MATLAB® menu above to get more information or to Matlab Central. Click the button below to try free version of our CFD software.

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Later, just enjoy simulating NACA airfloil in MATLAB® and everything else, what you imagine.

Below find our Matlab CFD code example with short tutorial in the comments. You can also download more tutorials after installing this Matlab toolbox for fluid mechanics.

Source code:

clear;

clc;

% Import, display and convert mesh
[p,e,t] = importMeshGmsh(‘naca5418.msh’);
displayMesh2D(p,t);
[p,e,t,nVnodes,nPnodes,indices] = convertMeshToSecondOrder(p,e,t);

% Define fluid
nu = 0.01;

% Init solution
[u, convergence] = initSolution(p,t,[1 0],0);
maxres = 1e-3;
maxiter = 25;

% Start iterations
for iter = 1:maxiter
[NS, F] = assembleNavierStokesMatrix2D(p,e,t,nu,u(indices.indu),u(indices.indv),’nosupg’);

% Apply boundary conditions
[NS, F] = imposeCfdBoundaryCondition2D(p,e,t,NS,F,10,’inlet’, [1 0]);
[NS, F] = imposeCfdBoundaryCondition2D(p,e,t,NS,F,12,’slipAlongX’);
[NS, F] = imposeCfdBoundaryCondition2D(p,e,t,NS,F,13,’wall’);

% Compute and plot residuals
[stop, convergence] = computeResiduals(NS,F,u,size(p),convergence,maxres);
plotResiduals(convergence,2);

% Break if solution converged
if(stop)
break;
end

% Solve equations
u = NS\F;
end

% Generate pressure data
pressure = generatePressureData(u,p,t);

% Display pressure field
figure(3)
displaySolution2D(p,t,pressure,’Pressure field’)

% Export pressure field to Gmsh
exportToGmsh2D(‘pressure.msh’,pressure,p,t,’pressure field’);