2019-10-14 MercuryDPM Meeting

This meeting takes place every two weeks on Monday at 11:00 in N217

Attendees

Discussion items

What	Who	Details
Conference	Ant	Some of us should go to this: Dear Stefan, I would like to invite you and colleagues of the Twente Centre for Scientific Computing to participate in the ACOS symposium on 30 October at DIFFER Eindhoven. Could you share this invitation with your TCSC colleagues? ACOS is the only multidisciplinary computational sciences symposium in the Netherlands. Attention will be given to different computational methods, machine learning, molecular dynamics, multiscale modeling and many more topics. In addition to academic and industrial participants, the Netherlands eScience Center, SURFsara and CWI will be present. We have formed an interesting program with various keynote speakers, a poster session and contributed talks. Registration is open until 15 October 2019, 12 p.m. via www.nwo.nl/acos . I hope to meet you there! Best regards, Stephan van Duren Thomas Weinhart will go
	Hongyang	List of recent conferences and calls for mini-symposia ASCE Durham UK: https://sites.durham.ac.uk/emi2020-ic/accepted-minisymposiums/ WCCM Paris: https://www.wccm-eccomas2020.org/frontal/MSList.asp EMI: https://www.emi-conference.org/program/call-mini-symposia
Comparison of codes	Ant	Hope that you are doing well. ISSMGE’s TC105 Geomechnics from Micro to Macro chaired by me is running a DEM round robin test. https://www.issmge.org/news/tc105-dem-round-robin-test Can you pass this news to our Powders and Grains colleagues, if possible? Thanks in advance. Best wishes, Hongyang Cheng takes lead, will contact the organisers.
External problems	Ant	Luca When configuring cmake I get the first error, concerning a CMP0057 error. I get rid of it by editing the file Source/CmakeModules/MercuryDocumentation.cmake and commenting the first line (cmake_policy(SET CMP0057 NEW)). Nik (nf338@cam.ac.uk) DPM issues.docx Thomas Weinhart Take a look at Nik's code
Release		Coming
Docker	Hao	No news, no h.shi-1 only Linux version is tested, need to compile all the settings before move to other systems. Hao needs to talk to Han this week on the docker before he leaves. Hao added the MercuryDPM-Trunk docker image for both Ubuntu and Mac. The windows version will be tested later on. Update: Docker does not work on Windows home, even if HyperV is installed. Need to test on Windows Professional & Enterprise.
Courses	Thomas	Basic C++ will be given by Thomas Oct 28-30. C++ for Developers be given by Anthony Oct 30 - Nov 1. Juan, Hong, Juan, Mitchel, Hao, Yousef are interested. A MercuryDPM course is not planned, although Julius would be interested. There are two UTstudents that will take teh Basic and Developers version.
Oomphlib coupling	Mitchel	1-way coupled code is approx 4000 faster but does not work for non-refinables elements as it needs the extra data Hao did the test on 4000 particles with new code, the Oomph-part is indeed much faster than the older version, this reduces the total simulation time by approx. 20%. However, it seems somewhere else is getting heavier and the new run compare to the old run is actually longer. Hao checked with Mitchel on both old and new implementations and found out the time cost difference on the locate_zeta function in pressure gradient. Think of updating coupling force not every Mercury Timestep to reduce the run time. Anthony Thornton and Thomas Weinhart will look at it with Mitchel Post on Wednesday
Jinja or Jinja2	Hao	Do we want to add a python interface to MercuryDPM in the future? Would be useful to use in combination with GrainLearning. We also have the Mercury command line interface, but that cannot pass functions.
MercuryMonth		Starts April 20; first week we give the MercuryDPM course (April 27-May 22) Thomas Weinhart book Vrijhof There is a student from Erlangen (attanded DEM8) who might be interested in writing this interface in the MercuryMonth

Other items discussed:

Next meeting, 14 Oct 2019 at 11:00