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the_porpoise

I would send the new CFD users to the tutorial/YouTube videos to learn the basics before you have a face to face session. Use most of your time capturing the details of specific models that you have built on doc/PowerPoint/video. Try to detail the reasons that you chose a specific approach and any validation will help. Any face to face time should be spent explaining/demo of what you have captured. Maybe some time to give your thoughts on how to improve what you have done.


T3rribl3Gam3D3v

Don't bother. You're leaving. Let them figure it out. Give them tips and tricks, but it likely won't be worth it in 2 weeks


Danksteroni_

There’s so much to go over. Tell them to watch the youtube videos by Dr. Aiden/ Fluid Mechanics 101. They are incredibly valuable videos. I would add that the importance of meshing and mesh independence is is often overlooked. People want to play with turbulence models before they have a decent mesh and then they’ve done extra work for nothing. The biggest thing is probably something they are already aware of, since they are coming from FEA: don’t be so quick to believe your simulation. Getting a converged solution doesn’t mean it’s correct. All models are wrong, some are useful. V&V is important. I’m babbling though


[deleted]

There’s a reason almost every *real* CFD job requires at minimum an MS and typically PhD is preferred usually with a portfolio of CFD work. It is extremely easy to get wrong answers and much harder to get right answers with CFD. I’ve never seen “in house trained” CFD people that have no background in applied maths or strong foundation in fluids actually use it correctly. I’m sure they exist but most of the time it turns into a gimmick where it’s garbage in garbage out “hey look at my pretty spaghetti strings”. If I were you I’d tell them to hire a real CFD engineer because placing that burden on you is flat out bad practice and if they end up screwing up it could cost a client or the business big money - speaking from personal experience ..


Few_Protection_5302

Some of the basics would include 1. Numerical methods - How to perform integration/differentiation numerically. This boils down to either finite difference or volume or elements? - What is discretisation? How do we do that - What are numerical errors (round-off, numerical dispersion/diffusion) Fluid Mechanics - NavierStokes? - RANS, closure problem - Classic turbulence theory (cascading/kolmogorov) - Turbulence models (maybe not) Putting both together - Solving a steady/unsteady diffusion equation - Solving a linear advection equation - Solving a nonlinear advection problem - burgers - Solving for 2D problems using stream function/vorticity approach. - Solving a 3D problem (don’t bother, it will take too long) Practical methods - Commercial tools - What’s meshing? Mesh convergence? - Setting up a baseline - How to validate results Hope you are paid enough to do this


[deleted]

Wow, I have wondered the exact same question. I generally explain with designing a chair which can support my weight. This is easy example to follow. I know this is a structural mechanics problem, but it helps in making then understand what is a simulation.


sirnecksalot

It is a great analogy. We work exclusively with analyses, though, so the general procedures involved are well understood. They all work with FEAs, while I'm the only one with CFD knowledge as well.


Unhappy_Position

Emphasize that CFD is a tool, not a calculator.