How can I calculate a singular integral due to Kirchhoff integral in supersonic flow and mach cone line?

Hamed Faghanpourganji @Hamed_Faghanpourganji

06 June 2016 1 5K Report

Hi everybody,

I am a Young researcher in aeroacoustics and I work with Kirchhoff integral in supersonic flow, due to Mach cone I face with a singular integral, in simple form of these integrals are in attached figure form and i like to solve this problem,

who can help me?

With Best Regards for your time

Hamed Faghanpourganji

Dear Dr.Bernard

Thank you so much for answer

but i think my problem is a little difference,

i suppose shock occur in behind the vibrating structure and i don't consider shock effect in my computation, i e i have completely uniform flow,

about FWH analogy, i think this problem exist in it too, because i have surface integral in solid surface and it appear again

Regards

Badges
Science topic

More Hamed Faghanpourganji's questions See All

How can import CFD/experiment data to Comsol multiphysics?

11 December 2016 2,637 6 View

How can I model Pitching and plunge airfoil in COMSOL multiphisics?

Dear alli want to simulate a problem same as attached figure in Comsol, but modeling of virtual plunging/pitching spring is my concern,could be anybody help me?The Best

09 October 2016 3,611 1 View

How is Comsol efficiency in CFD based aeroelasticity problems?

Hi somebody May you share your experience in this topics with me? Thank you so much for time gift Hamed Ganji

07 August 2016 3,357 1 View

How can removed NAN output from Matlab ODE solver?

06 July 2016 3,450 3 View

What is the Best Way for Parallel Processing in Matlab?

11 December 2015 6,905 4 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View