ET Workshop Spring 2011 - Revision history

77.2.10.204: fix spelling of restaurant

2013-07-15T15:35:50Z

fix spelling of restaurant

12.20.177.6: /* Progress reports */

2011-05-04T00:27:51Z

‎Progress reports

131.215.195.234 at 17:58, 3 May 2011

2011-05-03T17:58:51Z

131.215.195.234 at 17:53, 3 May 2011

2011-05-03T17:53:54Z

Bmundim: /* Suggested close by restaurants */

2011-04-27T00:22:01Z

‎Suggested close by restaurants

Bmundim: /* Welcome to the Einstein Toolkit Spring workshop */

2011-04-27T00:19:54Z

‎Welcome to the Einstein Toolkit Spring workshop

131.215.195.137: /* Welcome to the Einstein Toolkit Spring workshop */

2011-04-26T17:16:37Z

‎Welcome to the Einstein Toolkit Spring workshop

131.215.195.196 at 22:29, 25 April 2011

2011-04-25T22:29:35Z

71.84.51.57 at 18:27, 23 April 2011

2011-04-23T18:27:51Z

131.215.195.196 at 20:36, 21 April 2011

2011-04-21T20:36:55Z

@@ Line 121: / Line 121: @@
 Bar: Lucky Baldwins
-Restaurants: My Back (?)
+Restaurants: Malbec
 === List of participants ===

←Older revision		Revision as of 00:27, 4 May 2011
Line 153:		Line 153:


−	:- The MHD working group (primarily Bruno, Roland, Tanja, and ~~myself~~) worked on the following tasks:	+	:- The MHD working group (primarily Bruno, Roland, Tanja, and Josh) worked on the following tasks:
	:: 1.) We've added a new gridfunction, "Bcons" to GRHydro, to represent the conserved, densitized magnetic field vector, which is related to the primitive undensitized variable HydroBase::Bvec by the relation Bcons = sqrt(gamma) Bvec. Besides modifying Con2Prim and Prim2Con to account for the change, we also modified the fluxes to use the conserved B-field throughout and modified the /RHS calculation to evolve the conserved version.		:: 1.) We've added a new gridfunction, "Bcons" to GRHydro, to represent the conserved, densitized magnetic field vector, which is related to the primitive undensitized variable HydroBase::Bvec by the relation Bcons = sqrt(gamma) Bvec. Besides modifying Con2Prim and Prim2Con to account for the change, we also modified the fluxes to use the conserved B-field throughout and modified the /RHS calculation to evolve the conserved version.

←Older revision		Revision as of 17:58, 3 May 2011
Line 151:		Line 151:

	: -Peter Diener designed and implemented an improved load balancing mechanism for Carpet that should be able to provide better load balancing, in particular if the domain is "uneven", i.e. if there are multiple unequal-sized patches, or if the number of processes is not a cube. This mechanism is now attached to Carpet and ready for testing.		: -Peter Diener designed and implemented an improved load balancing mechanism for Carpet that should be able to provide better load balancing, in particular if the domain is "uneven", i.e. if there are multiple unequal-sized patches, or if the number of processes is not a cube. This mechanism is now attached to Carpet and ready for testing.
		+
		+
		+	:- The MHD working group (primarily Bruno, Roland, Tanja, and myself) worked on the following tasks:
		+	:: 1.) We've added a new gridfunction, "Bcons" to GRHydro, to represent the conserved, densitized magnetic field vector, which is related to the primitive undensitized variable HydroBase::Bvec by the relation Bcons = sqrt(gamma) Bvec. Besides modifying Con2Prim and Prim2Con to account for the change, we also modified the fluxes to use the conserved B-field throughout and modified the /RHS calculation to evolve the conserved version.
		+
		+	:: 2.) We've modified the hyperbolic divergence cleaning formalism to bring it into a proper general relativistic form. The new format represents an explicit d'Alembertian wave equation with a damping term, and diagonal shocktube runs indeed show the numerical divergence shrinking as a wave travels at the speed of light away from the shock front..
		+
		+	:: 3.) We've redone several tests, including Prim->Con->Prim and vice versa, and shocktubes, finding that the code reproduces its prior behavior in flat space simulations, as it should. 4.) Methods for handling completely general equations of state in the Con->Prim conversion were discussed, and the initial coding steps have been written to serve as a template for the eventual production code. The methodology has been completely derived, and it is now a matter of implementing it into the code itself and checking it against non-trivial EOS to ensure that the proper results are generated. This will likely happen in the next month or thereabouts.

←Older revision		Revision as of 17:53, 3 May 2011
Line 140:		Line 140:
	: Bela Szilagyi		: Bela Szilagyi
	: Peter Diener		: Peter Diener
		+
		+
		+	=== Progress reports ===
		+
		+	: -Refluxing and regridding should now work together. The corresponding bug in thorn LSUDevelopment/Refluxing should be corrected.
		+	: -We plan to move thorn LSUDevelopment/Refluxing to LSUThorns/Refluxing, where it will be publicly available.
		+	: -Christian Reisswig is working on higher-order cell-centred ENO operators that will improve accuracy for hydro evolutions.
		+
		+	: -The Mercurial version of Carpet is now (is it?) the default version of Carpet that is available with the development version of the Einstein Toolkit. Frank Löffler configured the Mercurial server to allow public read-only access to the repository.
		+
		+	: -Peter Diener designed and implemented an improved load balancing mechanism for Carpet that should be able to provide better load balancing, in particular if the domain is "uneven", i.e. if there are multiple unequal-sized patches, or if the number of processes is not a cube. This mechanism is now attached to Carpet and ready for testing.

←Older revision		Revision as of 00:22, 27 April 2011
Line 118:		Line 118:

	=== Suggested close by restaurants ===		=== Suggested close by restaurants ===
		+
		+	Bar: Lucky Baldwins
		+
		+	Restaurants: My Back (?)

	=== List of participants ===		=== List of participants ===

←Older revision		Revision as of 00:19, 27 April 2011
Line 117:		Line 117:
	Unfortunately, we will not be able to provide or pay for lunch/dinner.		Unfortunately, we will not be able to provide or pay for lunch/dinner.

		+	=== Suggested close by restaurants ===

	=== List of participants ===		=== List of participants ===

←Older revision		Revision as of 17:16, 26 April 2011
Line 2:		Line 2:

	This workshop is focussed on improving the hydrodynamics of the ET: '''GRHydro'''.		This workshop is focussed on improving the hydrodynamics of the ET: '''GRHydro'''.
		+
		+	=== Program ===
		+
		+	'''Tue 04/26'''
		+
		+	14:00 - 17:00 First Session
		+
		+	: - Welcome, introductions (lead: Ott)
		+
		+	: - Setting goals for the workshop (lead: Ott)
		+
		+	: - Status of the EinsteinToolkit and the EinsteinToolkit paper (lead: Loeffler)
		+
		+	: - Status of the CIGR project (discussion, lead: Schnetter, Ott)
		+
		+	: - Goals for ET and CIGR in the next 3 months
		+
		+	: - Status report: MHD (Faber, Mundim)
		+
		+	: - Status report: Microphysics and EOS (Ott)
		+
		+	: - Status report: Refluxing (Schnetter)
		+
		+	: - Status report: BHNS initial data project (Haas, Loeffler, Mundim, Bode)
		+
		+	: - Status of other projects within CIGR/ET (anybody doing anything related)
		+
		+
		+	'''Wed 04/27'''
		+
		+	09:00 - 12:00 Hands on coding/testing 1 (TBD)
		+
		+	14:00 - 15:00 An overview of the Caltech-Cornell-CITA-WSU code SpEC (Szylagyi)
		+
		+	15:00 - 17:00 Hands on coding/testing 2 (TBD)
		+
		+	19:00 Workshop dinner (TBD)
		+
		+
		+	'''Thu 04/28'''
		+
		+	09:00 - 12:00 Hands on coding/testing 3 (TBD)
		+
		+	14:00 - 15:00 2 30 min Science talks (practice for APS? TBD)
		+
		+	15:00 - 17:00 Hands on coding/testing 4 (TBD)
		+
		+	<br>
		+	'''Fri 04/29'''
		+
		+	09:00 - 11:00 Hands on coding/testing 5 (TBD)
		+
		+	11:00 - 11:30 Closing discussion (lead: Ott)
		+

@@ Line 6: / Line 6: @@
 === Location in Space and Time ===
-The ET Spring workshop will be held from Tue, 04/26/11 (morning; official start afternoon) - Fri, 04/29/11 (morning)
+The ET Spring workshop will be held from Tue, 04/26/11 (morning; official start 2pm afternoon) - Fri, 04/29/11 (morning)
 at the [http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=caltech&aq=&sll=37.0625,-95.677068&sspn=66.70144,135.263672&ie=UTF8&hq=California+Institute+of+Technology&hnear=California+Institute+of+Technology,+1200+E+California+Blvd,+Pasadena,+Los+Angeles,+California+91125&ll=34.135911,-118.125609&spn=0.001093,0.002064&t=h&z=20&layer=c&cbll=34.135912,-118.1259&panoid=ohdCQ9peJ5k6yTRF0Saqwg&cbp=12,213.32,,0,-7.95 Cahill Center for Astronomy and Astrophysics at Caltech] and is organized
 by [http://www.tapir.caltech.edu/ TAPIR].

←Older revision		Revision as of 18:27, 23 April 2011
Line 80:		Line 80:
	: Ernazar Abdikamalov		: Ernazar Abdikamalov
	: Bela Szilagyi		: Bela Szilagyi
		+	: Peter Diener

@@ Line 9: / Line 9: @@
 at the [http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=caltech&aq=&sll=37.0625,-95.677068&sspn=66.70144,135.263672&ie=UTF8&hq=California+Institute+of+Technology&hnear=California+Institute+of+Technology,+1200+E+California+Blvd,+Pasadena,+Los+Angeles,+California+91125&ll=34.135911,-118.125609&spn=0.001093,0.002064&t=h&z=20&layer=c&cbll=34.135912,-118.1259&panoid=ohdCQ9peJ5k6yTRF0Saqwg&cbp=12,213.32,,0,-7.95 Cahill Center for Astronomy and Astrophysics at Caltech] and is organized
 by [http://www.tapir.caltech.edu/ TAPIR].
-The meeting will be in room Cahill 126.
+The meeting will be in room Cahill 273.