Wave propagation through fluid and granular material

[Damon Blanchette]

Hello!

I'm writing with more of a question about what is possible. I'm looking to simulate acoustic waves originating underwater, traveling through the mud, and reflecting off objects that may be present there.

So it seems like there would have to be an FSI simulation with an added granular area representing the "mud" that the water is on top of. Under the mud would be solid objects like spheres and cylinders. It's similar to seismic effects. I want to see how acoustic waves that originate in the water would travel through it, through the mud, and then reflect off the solid objects. Is this something that is possible with Project Chrono?

[Dan Negrut]

Hi Damon,

If I were to try something like this, I would stick with the FSI solver and would not have a “granular” region since that coupling between fluid and grains is tough to capture and also kills the integration step size.

Instead, I would model the mud as a continuum, since that is closer to what you have in reality anyway.

So then it would be “Volume A: Water”, and “Volume B: Mud”. They would both be represented as continuum and solved with the FSI solver. Volume A would sit on top of Volume B.

You would have two layers of different materials in the same sim. Almost like two phase flows.

Here’s the closest we’ve done to that: https://www.sciencedirect.com/science/article/pii/S0021999122001413?casa_token=f3pwPJImqC0AAAAA:OTCCtd4AM3RW1K9QfjV1rWoG0GvPYoUEAwp1L6irkq5GkWgE3S9ajN6ICGe0Ddz_B4hvgwrhi5CC

 

We’ve never looked at acoustic wave propagation in Chrono, but in the past we looked at acoustic wave propagation in the context of SPH, which is what is used in the Chrono::FSI solver: https://asmedigitalcollection.asme.org/IMECE/proceedings/IMECE2009/43864/185/344021?casa_token=r0K4lmDOr0MAAAAA:yIU14qa3VwusByp9VjiGFlCGTDwyaEv2oq5fJXurliymdWL2VPb6gkvI2Ko5jF507oo3L2GSBQ

 

Also, my two cents, with or without Chrono, this is going to be a challenging project.

Good luck to you.

Dan

 

-------------------------------------------------

Bernard A. and Frances M. Weideman Professor

NVIDIA CUDA Fellow

Director, Wisconsin Applied Computing Center

Department of Mechanical Engineering

Department of Computer Science

University of Wisconsin - Madison

4150ME, 1513 University Avenue

Madison, WI 53706-1572

608 772 0914

http://sbel.wisc.edu/

http://projectchrono.org/

-------------------------------------------------

FTL Labs Corporation

www.ftllabscorp.com

479 West Street Suite 48, Amherst, MA 01002

(413) 992-6075

 

CONFIDENTIALITY NOTICE: This e-mail communication and any attachments may contain confidential or privileged information for the use of the designated recipients named above. If you are not the intended recipient, you are hereby notified that you have received this communication in error and that any review, disclosure, dissemination, distribution, or copying of it or its contents is prohibited. If you have received this message in error, please promptly notify the sender or ad...@ftllabscorp.com and immediately delete this message and any attachments from your system.

 

--
You received this message because you are subscribed to the Google Groups "ProjectChrono" group.
To unsubscribe from this group and stop receiving emails from it, send an email to projectchron...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/22df71d4-8a46-4caa-afc7-c61f3fee58aan%40googlegroups.com.

[Damon Blanchette]

Hi Dan, thank you for the suggestions! This is enough to get me started at least. It's most definitely going to be a challenging project, and this is even just one part of it.

Thanks again,

Damon