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.
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 such project. Regards, Vova
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 experience with FORTRAN, the coding part should not be a problem. As professional mathematician (PhD), specialized in numerics, I have implemented quite a few ODE/PDE-based models. As a professional freelancer, I am interested in a satisfied customer and an ongoing collaboration!
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.
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.
Pls, hire me.
Regards
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 matlab
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 explaining the mathematical derivation of the problem as I am not very conversant with acoustic waves.
Waiting eagerly for your reply.
Have a nice day.
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 developed simulations of fluid flow similar to this.
The boundary conditions may depend upon how you have set up the wave equations and the spatial differences. If you could provide me with your existing Fortran code or a document describing your equations, then I could develop my model so that it is as easy as possible for you to integrate into your program.
Please contact me if you require further information. I look forward to helping you solve this problem.
Sincerely,
Anthony
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 working on implementation and development of Audio-Video systems for live stream and also assisting in the design and development of new studio for the radio station, which has helped me gain hands on experience in architectural acoustics and engineering acoustics.
Besides work experience my education background has prepared me as an ideal audio/acoustic engineer. I am certain that my skills can be used effectively to complete your project on time and gain sustainable results.
I look forward to talk to you soon and discuss your project.
Thank you for your time and consideration.
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.
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 programming in Fortran, since it is my programming language of choice.
My only request is to give the project requirements more detailed for me, by which I mean a more detailed description of initial and boundary conditions.
I am very enthusiastic to do this project and wish to have a fruitful cooperation with you.
