SPHC Astrophysics Applications |
|
Movie of a pulsating star envelope with an RT unstable layer.
Version: 12.02
|
m3_RRL2c3...
|
|
|
|
|
Stellingwerf
February 2013 |
| This is a 2D model of a spherical RR Lyrae envelope that is free to pulsate, and contains a density inversion that is RT unstable, similar to the convection layer found in realistic models. Note mixing strengthens with each outgoing shock, suggesting Richtmyer/Meshkov instability. (NOTE: 30 Mb file, NOT a streaming video!)
At the end of the movie, the KE versus time plot is shown. Note that the mixing event quenches the pulsation, but the pulsation persists to the end of the run at small amplitude. |
|
|
RR Lyrae 3D Pulsating envelope Model Setup
Version: LV3-6
|
RR2.inp
|
0Units.inp
|
|
|
|
Stellingwerf
May 2014 |
| This is the pulsation model shown in the 3D movies. Has embedded unstable mixing layer at the convection zone, and develops an extended atmosphere / corona / wind.
Runs with the open source version of SPHC.
Must have the units.inp file in the same directory. |
|
|
Movies of 3D RR Lyrae Pulsation Model - See Abstract for file links
Version: 12.04
|
|
|
Stellingwerf
December 2013 |
| Download a movie of the cross section and velocity of a 3D RR Lyrae model with unstable mixing layer and extended atmosphere/wind here (12 Mb).
Download the "sky view" movie of this model here (12 Mb).
Color in the sky view film indicates temperature, with red = 5,000 K, blue = 10,000 K. |
|
SPHC Demos |
|
Steel Plate Oscillations / Rayleigh-Taylor Instability
|
42_veloci...
|
RT_SPHC.pps
|
|
|
|
Stellingwerf
May 2007 |
| 1) Oscillations in a steel plate following an impact at the center of the plate. Color = velocity.
(Powerpoint movie, click to see movie in full screen display)
(NASA project)
2) Rayleigh-Taylor Instability and subsequent mixing in a 16 m block of water. The red layers have a density of 2, the blue layers are density 1. Normal gravity is on. There is a square indentation of the interface at time zero. Note the surface waves generated by the turbulence. |
|
SPHC Overview |
|
SPH Basics
Version: 2
|
SPH_basic...
|
|
|
|
|
Libersky, Stellingwerf
April 2012 |
| Motivation and derivation of SPH/SPHC technique. |
|
|
SPHC Summary
|
SPH_Summa...
|
|
|
|
|
Stellingwerf
January 2011 |
| Presentation showing the SPHC assumptions and features.
Impact examples are taken from work on space tether impacts.
Most examples are from early (2003) NASA projects. |
|
|
Impact Modeling with SPH
|
SPHC_Impa...
|
|
|
|
|
Stellingwerf and Wingate
April 1994 |
| An early summary of the code's attributes and results. Note that the code stability and strength model have been improved since this publication. |
|
SPHC User Guides |
|
SPHC User Guide
Version: 12.08
|
User.doc
|
|
|
|
|
Stellingwerf
July 2014 |
| General code overview, covering all aspects from installation and equations to usage. |
|
|
Wind Tunnel Modeling Capability
Version: 10.20
|
Wind_Tunn...
|
|
|
|
|
Stellingwerf
July 2010 |
| Guide to wind tunnel modeling capability for SPHC. Includes examples, results, code samples, and a discussion of the limitations of this approach. |
|
|
SPHC Validation Test Suite
Version: 12.44
|
Validatio...
|
|
|
|
|
Stellingwerf
March 2020 |
| Full documentation of the current code validation tests, with listings, as well as several examples of more advanced code applications. |
|
Tests |
|
SPHC Application to Fluid Interface Instabilities
Version: 1.1
|
SPHC_Inte...
|
|
|
|
|
R. Stellingwerf
July 2012 |
| Detailed background, issues, and validation of SPHC as applied to Richtmyer Meshkov interface instability. |
|
|
Shock Tube 1D - shock.inp
|
shock.inp
|
|
|
|
|
Stellingwerf
June 2007 |
| Standard 1D 4 to 1 density jump shock tube.
This is an example of an SPHC setup file.
View with any text editor. |
|
|
Rictmeyer-Meshkov InstabilityTest Case
|
RMfcomp.pdf
|
|
|
|
|
Stellingwerf
March 2011 |
| Comparison of a Mach 1.5 Atwood # = -0.67 interface instability modeled at University of Colorado versus the SPHC model. The CU model is running on an adaptive grid supercomputer code. SPHC is running on a PC. See Richtmyer-Meshkov movie here....
http://scales.colorado.edu/MSMSL/animations.html |
|
Utilities |
|
SPHC_Launch.s
Version: 1.00, 2.00
|
SPHC_Laun...
|
SPHC_Laun...
|
|
|
|
Stellingwerf
June 2016 |
| Script for launching SPHC batch jobs. Requires S_tran interpreter to run, but can be viewed with any text editor.
Launch runs jobs consecutively, Launch2 runs all jobs simultaneously. |
|
|
Units/Conversions Data Base
Version: 1.3
|
Units.inp
|
units_SI.inp
|
units_Br.inp
|
|
|
Stellingwerf
February 2014 |
| Units.inp = definition of a variety of units in terms of the basic cgs system. Allows any units to be used in an SPHC setup file. Use "read_file units.inp" to include in the run.
units_SI.inp = reads in the above file, and sets all output to SI units
units_Br.inp = same, but for British (engineering) units |
|
|
SPHC Data Post-processors
Version: 1
|
SPHC_Filt...
|
NBR.s
|
|
|
|
Stellingwerf
September 2012 |
| These are examples of SPHC data post processor scripts. They require stran.exe to execute (see Services->S_Tran)
1. SPHC_Filter.s - read a dump and filter the results - example here is to compute the total mass of "solid" material in region 1
2. NBR.s - read a dump and find "clumps" of connected particles. Write a summary of the number and size of all clumps found. |
|