Substances are generally formed in one of three phases such as gas, liquid
and solid states. According to pressure and temperature in the phase, the
phase may be changed to other phases. If the pressure is very high and
the temperature is also very high(occasionally moderate), substances become
supercritical fluids. Especially, some anomalous properties are found at
a near-critical condition in the supercritical state. We have developed
a computational code for simulating supercritical carbon dioxide and water.
A preconditioned flux-vector splitting scheme(PFVS) based on the preconditioning
method and the Peng-Robinson EOS have been employed. Currently the code
has been further modifed by linking with the PROPATH, which is a database
for thermophysical properties developed by Kyushu University. This code
is named as Supercritical-Fluids Simulator(SFS). Whole thermal properties
in SFS are calculated by the PROPATH's functions. Since the PROPATH has
sets of equations and data of thermal properties for 48 substances such
as N2, O2, CH4, NH3, H2, He, Ar, CO2 and H2O, SFS can calculate supercritical
fluids of arbitrary substance only by chnaging the library file *.lib to
that for other substances. In addition to this situation, flows at atmospheric
and cryogenic conditions can be also calculated. For examples, cabon-dioxide
gas, watar vapor, and water liquid can be simulated considering their compressibilities
even though the density change is quite trivial. This means that SFS can
apply to flows of arbitrary substance in gas, liquid and supercritical
conditions, even if the state is changed or multi state is included.
Capability of SFS（PFVS+PROPATH）
Numerical Examples
Natural Convections of Arbitrary Substance in Square Cavity assuming Atmospheric
Conditions
Rayleigh-Bènard Convection of Supercritical Carbon dioxide, Movie
Schematic of already calculated problems
Numerical examples of SFS＋BC
Numerical examples of 3DSFS＋BC
Publication lists
1. Satoru Yamamoto and Atsushi Ito, Numerical Method for Near-critical
Fluids of Arbitrary Material, Proceedings of 4th International Conference
on Computational Fluid Dynamics, (2006).
2. Satoru Yamamoto, Shinichi Yano, Akira Ishigame and Takashi Furusawa,
A Supercritical-fluids Simulator Applied to Flows of Aritrary Substance
in Arbitrary Conditions, 5th ASME_JSME Fluids Engineering Conference-San
Diego, (2007-7), CD-ROM.
3. Takashi Furusawa
and Satoru Yamamoto, Accurate Prediction of Transitional Flows among Gas, Liquid and Supercritical
Fluids, Proc. 5th Europian Congress on Computational Methods in Applied
Sciences and Engineerings, ECCOMAS2008-Venice, (2008-7), CD-ROM.
4. Satoru Yamamoto and Takashi Furusawa, Numerical Method for Flows of Arbitrary Substance in Arbitrary Conditions, Proc. 5th International Conference on Computational Fluid Dynamics-Seoul, (2008-7), Springer, 545-550.
5.Takashi Furusawa, Yasuhiro Sasao, Kentaro Sano and Satoru Yamamoto, Acceleration
of Supercritical-fluid Flow Computation using an Accurate Look-up Table
of Thermophysical Properties, Proc. of the 8th Asian Computational Fluid
Dynamics Conference, Hong Kong, (2010), CD-ROM.
6.Satoru Yamamoto, Takashi Furusawa, and Ryo Matsuzawa, Supercritical-fluid
Simulations across Critical Point, Proc. 6th International Conference on
Computational Fluid Dynamics-St. Petersburg, Computational Fluid Dynamics,(2010),
Springer, 661-667.
7.Satoru Yamamoto, Takashi Furusawa, and Ryo Matsuzawa, Numerical Simulation
of Supercritical Carbon Dioxide Flows across Critical Point, International
Journal of Heat and Mass Transfer, 54-4 (2011), 774-782.
8.Satoru Yamamoto, Ryo Matsuzawa, and Takashi Furusawa, Simulation of Thermophysical
Flow in Axisymmetric Nozzle with Expansion Chamber, AIChE Journal, 57-10(2011),
2629-2635.
9.Takashi Furusawa and Satoru Yamamoto, Numerical Simulation of Supercritical
Water in T-Shaped Channel across Critical Point, Proc. ASME-JSME-KSME Joint
Fluids Engineering Conference, Hamamatsu, (2011), CD-ROM.
10.Satoru Yamamoto, Simulation of Thermophysical Flows (Plenary Lecture), Proc. Eighth
KSME-JSME Thermal and Fluids Engineering Conference, (2012-3), USB-Mem.
11. Shibo Qi, Takashi Furusawa, Satoru Yamamoto, Kazuhiro Nakahashi, Comparison
of Different Wall Bounday Treatments for Preconditioning Method Coupled
with Building-cube Method, Procedia Engineering, 61(2013), 298-305.
12. Shibo Qi, Takashi Furusawa, Satoru Yamamoto, Numerical Simulation of Supercritical-fluid
Flows over Arbitrary Geometry, Bulletin of JSME, Journal of Fluid Science
and Technology, 9-1(2014), 1-16.
13. Satoru Yamamoto and Takashi Furusawa, Thermophysical Flow Simulations
of Rapid Expansion of Supercritical Solutions (RESS), Journal of Supercritical
Fluids, 97(2015), 192-201 (Featured online on 'Advances in Engineering':https://advanceseng.com/general-engineering/thermophysical-flow-simulations-of-rapid-expansion-of-supercritical-solutions-ress/).
14.Shibo Qi, Takashi Furusawa, Satoru Yamamoto, A Numerical Method applied
to Forced and Natural Convection Flows over Arbitrary Geometry, International
Journal of Heat and Mass Transfer, 85(2015), 375-389.
