# Acoustic Wave Solutions - Fortran/MATLAB

I am currently trying to create a fortran program that will solve the flow throughout an engine manifold. I am using acoustic waves to do this.

I am NUMERICALLY solving two wave equations. one for a left propagating wave and one for a right propagating wave.

I have used all explicit schemes. Using finite differences for the spatial numerical scheme and a Runge-Kutta 4 for the time integrator. These waves simulate acoustic waves. One entering the pipe at the left, and one entering the pipe at the right.

I need to successfully apply boundary conditions (@ x=0 and x=L). When implemented correctly, these boundary conditions will transform the waves.

For example if I implement a closed wall condition. The wave should bounce of that wall and come back out. If I implement an open wave it will be inverted and sent back into the pipe as an inverted wave.

The first step of the project that I want you to do is.. implement these boundary conditions so that this happens when the programme is left to run! I dont mind if you want to do it on MATLAB, and I dont mind if you want to use your own numerical scheme. However, accuracy and stability must be ensured.

The wave shaped will be calculated from a simple analytical equation, say: exp(-200*(x-0.1)^2) and exp(-200*(x-0.9)^2). If you plot these two on a x-y graph, youll see what the waves start like. When the programme runs, the waves will approach each other at a speed of the speed of sound.

I would need an estimate of how long it will take you to do it. If its too long, then I would of probably already fixed it by then (I hope).

I cant see this being a big problem for experienced coders, and a very short task. I have more work after this. If I am impressed with this small piece of work, I will delegate more work to you (If you choose). Thank you.

Project ID: #5750449

## 14 freelancers are bidding on average £117 for this job

nhatvo

I found this toolbox that may help: www.k-wave.org k-Wave is an open source MATLAB toolbox designed for the time-domain simulation of propagating acoustic waves in 1D, 2D, or 3D. The toolbox has a wide range of f More

£150 GBP in 3 days
(4 Reviews)
5.7
VolKa

Hi. I think I can do this. I know Fortran as well as Matlab ( from your description I didnt understood what program do you want me to use here F or M). Besides, I am ph.d in physics and think this can be usefull in a s More

£100 GBP in 5 days
(47 Reviews)
5.4
itachi23

A proposal has not yet been provided

£77 GBP in 1 day
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4.9
dimitarpartenov

Hello I am interested from your project. I have done many numerical project for solving PDE using matlab or Fortran

£150 GBP in 5 days
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3.8
mariannedelcu

PhD in physics. Large experience in research and complex phenomena simulations using Matlab. I will be glad to help you. Please send a message back to establish the details.

£100 GBP in 5 days
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3.8
engrdilaawaiz

Hi, electrical engineer done masters in electrical microwave engineering currently doing PhD in the same, kindly send me equations I will prefer using matlab because I am doing my own semester project in FDTD using mat More

£222 GBP in 10 days
(2 Reviews)
4.2
leondiagon

Dear client, Allow me to introduce my self to you. I am an engineer who holds master degree in digital signal and image processing. My thesis was natural image segmentation based on color and depth information using More

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(5 Reviews)
3.4
jinjie2121

I am an expert in computational fluid mechanics and Matlab. I have many experiences in this field. I have used finite different method. I can also ode45 function(Runge-Kutta 4) in Matlab. I can do it correctly. Pl More

£60 GBP in 3 days
(6 Reviews)
2.5
yshoraka

I am a mechanical engineering phd student, with a lot of expertise in CFD and numerical simulation of partial differential equations, thereby could be the suitable candidate for this project. I will do all the progr More

£150 GBP in 6 days
(0 Reviews)
1.5
amritahuja

I have PhD in Astrophysics. Have 6+ years SW company work experience. I'll be verymuch interested to solve the problem on Octave (freeware equivalent to Matlab). I have put low bid, because I want the project to win.

£55 GBP in 3 days
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0.0
schapotschnikow

I can implement quite quickly the boundary conditions, so that you can select them at runtime. It shall take me a couple of hours, including getting acquainted with the code and its functionality. With my 7 years exper More

£111 GBP in 1 day
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aschnellbeck

Hello, I will code the boundary conditions for both closed and open-ended pipes into a Matlab model. I expect that this will be complete in 7 days. My background is in aerospace engineering and I have previously deve More

£100 GBP in 7 days
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aeroexpert

Hi, I am having extensive experience in programming and solving numerical problems in MATLAB. I would like to help you on this project. However, I would appreciate if you give me some theoretical background or link ex More

£111 GBP in 5 days
(2 Reviews)
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prabhanjank

My experience as Technical Engineer (Intern) at K-Beach Global Radio has prepared me to collaborate with and achieve actionable results through simulation of MATLAB and various sound design software. I am currently wor More

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