Rank: 1450 based on 105 downloads (last 30 days) and 4 files submitted
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Brent Lewis

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Lat/Long
40.0, -105.0

Personal Profile:

Aerospace Engineering/Applied Mathematics Student

Professional Interests:
Propulsion/Finite Elements/

 

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Files Posted by Brent View all
Updated   File Tags Downloads
(last 30 days)
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04 May 2007 Screenshot Mass-Dampening-Stiffness Matrix EOM Program sets up Mass-Dampening-Stiffness Matrices for proprtionally damped system of mass, springs Author: Brent Lewis mechanical modeling, eom, equation of motion, motion, structures, dynamics 17 1
  • 5.0
5.0 | 1 rating
15 Jan 2007 Complete 1976 Standard Atmosphere Calculates Temperature, Pressure, Density, Speed of Sound, Gravity, Dynamic/Kinematic Viscosity, k, Author: Brent Lewis aerospace, aeronautics, aerodef, standard atmosphere, temperature, cheesecake 57 11
  • 4.5
4.5 | 10 ratings
05 Jan 2007 Screenshot Latex Figure Output Given a value, array, equation or array of equations. This program will output to a figure of desir Author: Brent Lewis symbolic math, latex figure, array, matrix, pretty, display 15 4
  • 4.0
4.0 | 6 ratings
04 Jan 2007 Multi-Dimensional Gauss Points and Weights Gives the gauss points and weights for 1-D through 3-D along with 6 node triangular finite element Author: Brent Lewis integration, gauss points, weights, multidimension, 6 node, triangle 16 2
  • 4.33333
4.3 | 3 ratings
Comments and Ratings on Brent's Files View all
Updated File Comment by Comments Rating
05 Mar 2014 Complete 1976 Standard Atmosphere Calculates Temperature, Pressure, Density, Speed of Sound, Gravity, Dynamic/Kinematic Viscosity, k, Author: Brent Lewis Chou

26 Nov 2011 Complete 1976 Standard Atmosphere Calculates Temperature, Pressure, Density, Speed of Sound, Gravity, Dynamic/Kinematic Viscosity, k, Author: Brent Lewis B.

This code is not entirely correct. On error, among others, is that the author misinterpreted Equation (39) of the original published document on the Standard Atmosphere of 1976. This involves the calculation of the Hydrogen number density. The author oversimplified the equation. Also, the temperature gradient in Equation (28) involves a constant "a" which the author had the wrong sign on.

26 Oct 2010 Latex Figure Output Given a value, array, equation or array of equations. This program will output to a figure of desir Author: Brent Lewis Dennis A. Dean, II, Ph.D.

10 Oct 2010 Multi-Dimensional Gauss Points and Weights Gives the gauss points and weights for 1-D through 3-D along with 6 node triangular finite element Author: Brent Lewis Moseley, Philip

Bugs and inconsistencies in the triangular points.

02 Sep 2009 Complete 1976 Standard Atmosphere Calculates Temperature, Pressure, Density, Speed of Sound, Gravity, Dynamic/Kinematic Viscosity, k, Author: Brent Lewis Brooks, Evan

Do you have an alternate source or correction for your value of Helium number density @86km? The value in Table 9 looks like 10^10 to me, but you have it in "atmo_compo.m" as 10^14.

Nice submission otherwise, there's a lot you could do to vectorize the computations though.

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