Fluid Mechanics Problem Creating a Mesh

by jboeck6
Tags: aerodynamics, air foil, fluid mechanics, mesh, triangle
 P: 1 We are beginning a project in my Intermediate Fluids class to make a program that can do aerodynamic analysis on an air foil. First, given any three nodal coordinates (x,y) of a triangle, we must write a program to compute its surface vectors and area of the triangle. The nodes will be in clockwise order. I know I can compute the area through a determinant by doing A=0.5*det([1,1,1;x1,x2,x3;y1,y2,y3]); where 1, 2, and 3 denote each node and x and y are the coordinates. Please help me start off my code or give insight to calculating the surface vectors. Also, we will be using MATLAB. Thanks!
 P: 1,333 Well you know the direction from any one point to an adjacent point, right? Treat the line connecting those two as a vector and cross it with a vector coming "out of the page" from the same vertex you started with and you will get a mutually orthogonal vector. Then just normalize it and place it in the center of the line connecting your two points.

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