Supercritical fluids at the near-critical point present some anomalous
properties, such as rapid changes in reactivity, thermal-conductivity,
speed of sound, and so on. At the near-critical point, the fluids have
both liquid and gaseous properties. Those fluids have been already studied
experimentally such in chemical, environmental and mechanical engineerings.
Research groups in these fields are challenging to utilize those anomalous
properties for developing innovative facilities or materials. However,
since the supercritical fluids must be kept by high pressure and high or
moderate temperature, the experimental facilities for the fluids to maintain
the severe conditions may be expensive. In addition to this, the measurement
of those anomalous properties in the fluids seems to be not so easy. Recently,
we developed a preconditioning method for simulating flows at very low
Mach number.We apply the preconditioning method to the calculation of near-critical
fluids. In addition to this, the Peng-Robinson equation of state for real gas is
newly employed for the present method to calculate the thermal properties
of near-critical fluids. Also the speed of sound is theoretically derived
from the equation and installed in the present method.
Calculated results 1,2,3,4
Satoru Yamamoto, Preconditioning Method for Compressible Near-critical
Fluids in Micro-channel, Proceedings of 3rd Int. Conf. on Computational
Fluid Dynamics-Toronto, (2004-7).
Satoru Yamamoto and Byeong Rog Shin, PRECONDITIONED
FLUX-SPLITTING METHOD FOR CONDENSATE FLOWS AND NEAR-CRITICAL FLUIDS,
ECCOMAS2004-Jyvaskyla, (2004-7), CD-ROM.
Satoru Yamamoto, Masayuki Toratani and Yasuhiro Sasao, Preconditioning
Method applied to Near-critical Carbon-dioxide Flows in Micro-channel,
JSME International Journal, 48-3(2005), 532-539.
