Meshfree CFD
 

I'm looking for some software that doesn't require a mesh. The meshing is taking weeks and process time weeks more. Any ideas?

Yes of course, grab some money and buy a Lattice-Boltzmann code. If you have some time Direct Numerical Simulation (DNS) would also be interesting for you.... ;o)

Or you can outsource the meshing part to some experts, who know what they are doing? Seriously, what are you meshing?

LB is actually a path we are looking into but would prefer commercial software.

Project is rotating a high-powered spray of liquid inside of a pipe (cleaning off the buildup with high pressure). Nozzle will rotate around central axis and travel along pipe. Pipe surfaces have bends and occasional protrusions.

Okay, sounds interesting. Palabos is indeed a LB-solver, which will be integrated in NUMECA's new environment OMNIS and will be commercially distributed. In about 10 hours there's a webinar about it. If you are interested in the actual status I can keep you updated. Meanwhile, you can check out https://www.numeca.com/product/omnislb .

Having spent quite some time developing a grid generator for LB solvers, I am baffled every time it is categorized as a "meshless" method :confused:

Flotus you are right of course - it was meant that the user does not need to spend time for mesh generation when using a LB code, since it is generated automatically.

Take a look at CONVERGE software.
It creates the mesh automatically, has good capabilities for spray modelling and includes automatic mesh refinement.

the Converge software didn't do well with the auto mesh according to my co-worker. Any experience on using particles (Lagrangian) instead of a mesh?

No I've have not used LB softwares yet.
I don't know what are the requirements you have for your mesh, I'm using Converge for internal combustion engines (moving mesh + complex physics) and I'm ok with it, I've never had serious problems with the mesh so far

I found this on the web under a search for Meshfree CFD and may do a trial (yes, I actually clicked on an ad...). Anybody familiar with ParticleWorks?

http://www.enginsoftusa.com/Mesh-Free-CFD.html

How about using SPH? Afaik, it doesn't use a mesh.

I think you should figure out how to mesh it. But I highly recommend numeca. I've also heard nice things about CONVERGE.

Update - starting trial of LB method software. Will post how it does.

You can try smoothed particle hydrodynamics. It is mainly used for simulations such as galactic motion or planetary collisions.

We are in the process of working with ParticleWorks which uses what they call moving particle semi-implicit (MPS) method? Any experience with this software?

ISPH Code
 

I will be happy to send you my developed ISPH code that I wrote about 8 ISI papers and 10 conference papers with it:
1. Incompressible SPH simulation of landslide impulse-generated water waves. Natural Hazards, 82(3), 1779-1802.
2. Modified variable mass incompressible SPH method for simulating internal fluid flows. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 38(7), 2009-2027.
3. Eulerian ISPH Method for Simulating Internal Flows. Journal of Applied Fluid Mechanics, 9(3).
4. On the numerical simulation of the nonbreaking solitary waves run up on sloping beaches. Computers & Mathematics with Applications, 70(9), 2270-2281.
5. Comparative study on the accuracy of solitary wave generations in an ISPH-based numerical wave flume. Applied Ocean Research, 54, 115-136.
6. Simulating Solitary Wave Generation Using Incompressible SPH. Ann Limnol Oceanogr 1(1): 013-021.
7. On the Generation, Propagation and Runup of Solitary Water Waves on Steep Beaches, in 6th International Offshore Industries Conference (Tehran, Sharif University of Technology: 2015).
8. ISPH Numerical Simulation of Tsunami Generation by Submarine Landslides, Arabian Journal of Geosciences

specializedSPH - so does your code do something like this? Yes, I would like a copy.

https://enginsoftusa.com/Particlewor...y-Tsunami.html

your qt for sph code from specializedSPH
 

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Please contact me over the following lnk:
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sincerely yours;

For anyone reading this post - specializedSPH is charging for the SPH code. This is not a free item like it implies with 'happy to send'

Automatic grid generation will eliminate the meshing time but what type and how well it works will depend on what you are trying to simulate. Usually one is gaining some convenience at the price of a significantly less accurate simulation compared to one using a well adapted grid. This may or may not be appropriate depending on what you are trying to do.

Meshfree methods are a reasonable approach for only a relatively small number of engineering problems.