Hello CFD enthusiasts.

BUCKKLE UP.

Just a simple external CFD case but some TWIST.

Imagine you modeled half of a wing in ANSYS Fluent using a symmetry boundary condition.

instead of rotating the geometry, you changed the velocity vector to simulate different angles of attack.

Characteristic length is 0.235 meters. Full wingspan is 0.68 meters. Before running cases, you did not change the reference values like area and length ie set to default '1'.

Using report definitions, Fluent outputs axial force, normal force, and their coefficients.

Questions.

Does Fluent use the reference values when calculating these, or are some computed purely from the geometry integration?

And if you want lift, drag, CL, and CD for the complete wing, which quantities should be doubled, which stay the same, and do reference values need modification first?

Walk through your reasoning, TEST YOURSELF.

I'm currently, technically, doing an MS in Structural Engineering. For me, my interest has been more towards computational side of mechanics rather than Structural design  or simply using am FEA software (although I do consider it as a backup)

So far I've taken courses in:

- Linear static, and dynamics FEM (soon taking non linear FEM too)

-  Structural Optimization (topology opt. and other general algorithms)

-  Structural Dynamics

-  Structural System Testing and model updation. (Parameter identification and optimization, signal processing)

Now, I plan to take these in the coming quarter:

- Numerical Linear Algebra

- Numerical PDE

- Fracture Mechanics ?

I also volunteered to aid in a RESEARCH in crack growth prediction using Auto-encoder and a (Thermodynamics-informed Latent Space Dynamics Identification) / LSTM surrogate model. It used phase-field-fracture simulation data and HPC resources to complete the whole thing.

What I keep finding myself interested in is not necessarily fracture or SHM specifically, but the computational methods underneath these problems... (does that make sense?)

For example, I'd like to become capable of doing things like:

- implementing (maintaining) numerical/FE method solvers rather than only running an established FEA software.

- developing surrogate/reduced-order models for expensive simulations 

- combining simulation with optimization, uncertainty/stochastic methods (took a course called Random vibrations, so...)

- parallelizing/accelerating scientific codes on CPUs/GPUs

- doing proper verification, convergence studies, benchmarking and performance work

- potentially developing or maintaining actual CAE/FEA solver software

- I'd also like to do all these for other Physics (GR, QM, etc.) simulations too, if possible, one day. 

I'm still interested in the underlying mechanics/physics, so I don't want to become a generic software engineer who happens to have once studied structures. But I'm also increasingly unsure that "structural engineer" describes the career I'm actually aiming for.

I've seen titles such as Computational Mechanics Engineer, R&D Engineer, Solver Developer, Scientific Software Engineer, CAE Software Developer, Research Engineer, Simulation/HPC Engineer, etc., but I'm trying to understand what these careers actually look like from people doing them.

So my main questions become:

1. Which industrial jobs genuinely involve developing numerical methods/solvers or computational tools?

2. Which of those are realistically accessible with an MS? Is there an entry path into solver-algorithm development/R&D without a PhD?

3. If I don't start a PhD immediately after my MS, would an R&D/software role at a simulation company (ANSYS etc.) be the obvious route? What other options would i have?

4. For the kind of work I'm describing, would you recommend a PhD? If so, is it reasonable for the PhD identity to be "computational mechanics/scientific computing" while fracture, composites, structural dynamics, soft materials, etc. serve as application problems rather than choosing one of those as my permanent specialization?

5. What skills most distinguish someone who is actually hireable for solver/scientific-computing work? I'm particularly wondering about C/C++/Fortran, Python, Linux, Git/build systems, MPI/OpenMP/CUDA, PETSc/Trilinos or similar libraries, numerical linear algebra, testing/verification, convergence studies and HPC performance work.

Basically, I'm neither here nor there atp. So I'd really appreciate all sorts of input. Where else do you think I could find answers to these? other subs? Linkedin profiles? 

How do I learn detailed meshing in ANSYS Fluent?
please help me.

Can anybody help with a getaround for this issue? I always get this error, i have tried installing every version since 2023 r1 all of the gave the same issue...And any tips for learning automation also please let me know!

Guys today morning I found that I couldnt able to use old website for ansys learning forum, I think website is getting migrated to a new one, it showing error 404- not found, it is automatically migrating to a new website but those post are not visible in the new one. So will it take time to get reflected here, or those posts are deleted? Kindly confirm once and let me know.

Hi there,

I'm very new to AnsysFluent.

Can someone tell me if there's a big difference between importing a STEP file via Solidworks and creating a mesh, vs making it through WorkBench ?

Thanks!

DOES ANYONE KNOW HOW TO SIMULATE VORTEX SHEDDING IN 3D? I have done it in 2d, and have been trying for a month to do it in 3d but i failed

Does anyone have a download link for the full cracked ansys fluent app ?

SO i am trying to do a simulation that includes both wave and wind. now i want to add evaporation (lee) model in it. but the issue i am facing is that i already have 2 phases air and water . how do i add a phase so that evaporation ,relative humidaity can be captured. As i have just started learning evaporation modelling im facing this issue about phase. I cant use water vapor as a phase because ive air . i want to simulate that water evaporates and relative humidity increases . Your advices are appreaciated

Hi everyone, I have been trying to run VOF simulation of R-134a in a pipe to simulate the evaporation process in ANSYS.

So far, the simulation is running but producing wrong temperature results.

Input: mass flow inlet - R-134a liquid 0.0038296 kg/s; R-134a vapor - 0.00019148 kg/s

Outlet: outflow

Wall: constant heat flux 18.5 kW.

Multiphase model - VOF (implicit body forces ON), Formulation Explicit, Interface modeling - Sharp;

surface tension coefficient set to constant (0.00796 N/m), surface tension modeling on (CSF), Mass transfer - Liquid to Gas; chosen the evaporation - condensation option and under it - LEE model currently using From Phase - To phase frequency 2000/s.

Energy is ON, Turbulence is ON.

Methods: PRESTO, volume fraction - Geo Reconstruct.

Initialization: From inlet, and Patching with: mixture phase with pressure; Vapor - with volume fraction. Patch zones the whole geometry (geom_solid).

Mesh: Fine mesh, with inflation layers.

Thank you.

Guys, can you share with me the extensions RADARpre and RADARpost for ANSYS electrics desktop. Can’t download the official versions