Use of artificial intelligence and machine algorithims to revolutionize the field of fluid dynamics?

Hello Everyone ! I have been having this question in mind for quite a long time that we have this huge amount of data available in the form of wind tunnel experiments , in-flight data and...

31 December 2019 2,047 8 View

What is the size of laminar-turbulent transitional regime in terms of spatial and temporal dimensions ?

Hello Everyone , I was wondering is there any literature available on the extent of transitional regime in space and that for how long does it last ? Regards Aamir Sultan

31 December 2019 1,245 3 View

What happen with the conservation laws when we locally refine grids in adaptive meshes?

Does continuity , momentum and energy laws remain conserved when we use local refinement in adaptive meshes ?

31 December 2019 4,007 4 View

Why pressure far-field require a domain as far as 20 times of the characteristic length ?

Hello Everyone , Pressure far-field boundary condition is often recommended for flows with varying density , but why does it require so larger outer domains. Regards Aamir Sultan

31 December 2019 3,084 3 View

Why does Spalart Allmaras turbulence model underpredicts the Separation of Flow ?

Hello Everyone ! It is alway said that SA model is apporopriate for adverse pressure gradients then how come it lacks the ability to accurately predict separation ?

11 December 2019 354 2 View

Is Spalart Allmaras turbulence model capable of simulating Laminar Separtion Bubbles ?

Hello Everyone I am simulating an airfoil at Low Reynolds Number flow Regime Re=10^5 , in this particular case a laminar boundary layer separates , forming a laminar separation bubble , then...

11 December 2019 3,727 3 View

Which length is used as the reference length while doing external aerodynamic CFD simulation of a full aircraft ?

Hello Everyone , Hope you are doing fine . I have this question about the reference values , that which length should one use while doing external aerodynamic CFD simulation of a full aircraft...

10 November 2019 5,185 4 View

Ineffectiveness of Spalart-Allmaras model on a flat plate wing at Low Re No of 10e5 as the aspect ratio of wing increases ?

Hello Everyone , Hope you are doing fine . I was going through this paper of P. Cosyn and J. Vierendeels on ''Numerical Investigation of Low-Aspect-Ratio Wings at Low Reynolds Numbers'' in which...

08 September 2019 1,461 2 View

For a Mach No of 0.02 pressure based solver is diverging?

Hello Everyone , I am doing a 3D simulation of a 3D wing at a Reynold's number of 10^5 and a mach number of 0.02 . When I use pressure based solver my solution diverges within few iterations ....

02 March 2019 5,366 2 View

Udf to rotate a 3D wing to a certain roll angle for a specified period of time ?

Hello Everyone , Hope you are doing well. I have to rotate a 3D wing at different roll angles with the help of udf in Ansys fluent. Can someone provide me literature regarding this . Regards...

01 February 2019 6,374 2 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

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

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View