Own-made code ...

1). Is a CFD a tool to solve only 3D problems?

No.

2). Can any software tool that solves a fluid mechanics problem be considered a CFD?

Hmm, if you take the expression CFD literally, then yes. Many 1D flow solvers are based on Bernoulli - including empirical correlations.

3). Based on what we understand as a cfd, please mention the CFD softwares you know. For now, exclude the computational algorithms programmed by you.

3-D: Phoenics, GRAL, MISKAM, FDS

1-D: IDA Tunnel, Thermotun, SES, TunSim, Numsta, MFIRE, Camatt

And yes, I did not include the codes that I am/was working on.

(1) definitely not

(2) a widely-accpected CFD concept is based on Navier-Stokes equations. If you say numerical work, it can include potential flow equations etc.

(3) dimension is not that important in terms of distinguishing software. Generally, CFD Softwares, such as OpenFOAM, work well with 1-D 2-D and 3D problems. The limitation might be the computational cost when higher-D is used, but the dimension itself does not limit CFD in principle.

Thank you Hayder I. Mohammed

https://www.investopedia.com/articles/stocks/09/trade-a-cfd.asp

https://www.intertrader.com/en/cfds/cfd-trading-examples/

I think CFD is an Abbreviation of computational fluid dynamics and it is used to solve the complex problem. In other words, it used to solve complex geometries, complex boundary conditions, and complex flow behavior.

(1) If your CFD problem entails turbulent flow then 3D is key, even in a symmetrical flow regime that may look 2D. Turbulence tilting, twisting, turning and inherent energy exchange up and down the spectrum of eddy sizes is inherently a 3D phenomenon. So, you thow away much of the turbulent flow physics using 2D that would at least have a chance of being modelled in 3D. Cheers, LC.

CFD is a tool to solve complicated fluid flow problems, but I like to add that it still has its own limitations. Experimental techniques are complementary methods which could help cfd to overcome many its drawbacks. I just name some of the fluid phenomenas that cfd methods do not show proper answers and it should be validated by experiments: transitional flows, jet flows, some of shear flows, flow separation, wakes behind bluff bodies and so on.

(1) In general, CFD methods are not restricted to 3 dimensions. On the other hand, if you are attempting to solve a problem based upon the stream function, then that problem is restricted to 2D, but that is nature of the stream function.

(2) CFD is now a very broad discipline. You could say that even older potential flow methods are within CFD because they are computational and solve fluid mechanics problems, e.g., collocation methods, source, sink, vortex superposition techniques. That having been said, I suppose that when most people talk about CFD, they are referring to methods that discretize the governing fluid dynamics equations such as the Euler equations or Navier-Stokes equations. The field of CFD is quite involved. Now many CFD computer codes include other physics are well, e.g., heat transfer, chemical reactions, multi-phase algorithms, plasma physics, etc., etc.

(3) I am a user of the LESLIE3D (Large Eddy Simulation with LInear Eddy modeling in 3 Dimensions) computer code developed by Professor Suresh Menon at Georgia Tech.

3). Based on what we understand as a cfd, please mention the CFD softwares you know. For now, exclude the computational algorithms programmed by you.

https://www.cfd-online.com/Wiki/Codes

In 2D and 3D:

Siemens STAR-CCM+,

Numeca FINE,

Stanford University SU2,

and a lot of products from many developers...

CFD (Computational Fluid Dynamics) it is define as , is used to generate flow simulations with the help of computers. the CFD enables engineers to simulate and understand fluid flows in many cases they can not studied in the field or laboratory models after validation the model.

The equations involved in fluid dynamics are Navier-Stokes equations. Until now, solutions to Navier-Stokes equations have not been explicitly found except for some cases such as: Poiseuille flow, Couette flow and Stokes flow with of courses certains assumptions.

Computational Fluid Dynamics also called Colorful Fluid Dynamics in short CFD is the process of converting the partial differential equations of fluid dynamics into simple algebric equations and then solving them numerically to obtain some meaningful result. It have capability to solve complex flow geometry which is sometimes hard to reproduce in Wind Tunnel.

I suggest you to read this book:

https://www.researchgate.net/publication/305329841_Using_HPC_for_Computational_Fluid_Dynamics_A_guide_to_High_Performance_Computing_for_CFD_engineer

CFD is a tool to solve fluid dynamics problems using NS equations & computers.

Simply CFD relaxes you from a wide variety of coding for fluid dynamics, particularly for general purposes or in the primary steps of design where coming and experimental approaches are time-consuming or expensive to be employed.

Leighton Cochran Very interesting what you mention. True, most flows in nature are turbulent, and as a more approximate approach (2D, 3D) is approached, precision is lost. However, there are engineering issues that allow for these approaches without losing much precision for practical purposes.

Mohsen Jahanmiri I'm agree, both are complementary. I think opposite is also valid too, that is, experimentation also requires complementing with use of CFDs, mainly due to scaling problems (Froude Number, Reynolds Number, etc.) concerning the first thing, something in which CFD does have advantages. Further, because many times, for reasons of budget and time, experimentation is limited to certain conditions, while CFD can increase the number of those conditions for the same problem. I think it is a good topic for another debate.

Douglas Vinson Nance Thank you for your appreciations. How about is LESLIE 3D software for prediction to boundary layer separation?

Thanks Sergey N. Yakovenko . There are many options. I would add Iber model for the simulation of free surface flow in rivers and estuaries

For Leonardo Henao: I was a tech lead for developing LESLIE3D for about 15 years. It has all of the machinery for the boundary layer separation problem using Menon's Dynamic Large Eddy simulation. But most of our applications were for reactive shock dynamics. We also did some work for turbulent hypersonic flight. We had a lot of interest in shock related turbulence. For that application, LESLIE3D is kind of ground breaking.

Thank you Waqed Al-Mussawi, Severin Tinmitonde, Kishore Kumar Sankara, Hamed Majidian, Saeed Mojtabazadeh for your valuable contributions. I would like to add that I'm convinced that the CFD modeling and simulation of some physical phenomenon requires calibration and validation of at least one typical condition, be it through field data collection, experimentation or data from a scientific article. The calibration and validation procedure allows knowing the performance of the CFD in terms of discretization schemes, models for calculating gradients, turbulence modeling, sensitivity of numerical and physical parameters, etc. This in turn leads to more reliable results.

Douglas Vinson Nance: That sounds like it is a very complete code. Thanks for the information, I didn't know him.

All computer codes developed to solve physics problems require validation against either experimental/empirical data or exact solutions, or some combination of the two. Your interpretation of the term may be different, but in my purview, "calibration" is a vulgar term. Calibration is a "process" used to "turn knobs" or adjust parameters inside of a computer code in instances where the physics programming was simply not up to the task of matching data. Such measures are reliable for solving only one problem. LESLIE3D is developed by Hightower Professor Suresh Menon at the School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA.

Thanks Douglas Vinson Nance for the clarification

Can provide more details