2007
DOI: 10.1016/j.fluid.2007.07.041
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Calculation of convergence pressure/temperature and stability test limit loci of mixtures with cubic equations of state

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Cited by 50 publications
(26 citation statements)
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“…For this 16-component mixture, the first critical point was obtained in 0.61 s, using np ) 40. In this example, we note that the second calculation was a more difficult task, accomplished with np ) 80, NFE ) 11920, and time ) 1.24 s. Table 14 lists data for the reservoir oil with 29 components studied by Nichita et al 56 In Table 14, n i represents the number of moles of component i in the mixture. Nichita et al 56 used this mixture to determine the phase envelope, the spinodal, the convergence locus, and the stability test limit locus in the presence of CO 2 injection.…”
Section: Thirteen-component Mixtures Of Ghorayeb Et Almentioning
confidence: 99%
“…For this 16-component mixture, the first critical point was obtained in 0.61 s, using np ) 40. In this example, we note that the second calculation was a more difficult task, accomplished with np ) 80, NFE ) 11920, and time ) 1.24 s. Table 14 lists data for the reservoir oil with 29 components studied by Nichita et al 56 In Table 14, n i represents the number of moles of component i in the mixture. Nichita et al 56 used this mixture to determine the phase envelope, the spinodal, the convergence locus, and the stability test limit locus in the presence of CO 2 injection.…”
Section: Thirteen-component Mixtures Of Ghorayeb Et Almentioning
confidence: 99%
“…The most difficult conditions for phase stability testing are those in the vicinity of the singularity, namely the stability test limit locus (STLL) [5,6,[27][28][29], also called "limit of parallel tangent plane" [30] or limit of the "shadow region" [27].…”
Section: Phase Stability In the Conventional Approachmentioning
confidence: 99%
“…The singularity for the flash calculation problem is at the critical point (for T 6 ¼ T c , the singularities are at the convergence locus for the negative flash [28,30]), where two eigenvalues of the Jacobian matrix become zero [1] and the condition number is infinite. Along the phase boundary, the closer to the critical point, the smaller the minimum eigenvalue is, thus the condition number is higher and higher as the critical point is approached.…”
Section: Condition Numbers In Flash Calculationsmentioning
confidence: 99%
“…In this example, we consider an oil of petroleum reservoir with 29 components, studied initially by Nichita et al (2007). The composition of this reservoir oil is shown in Table 13.…”
Section: Examplementioning
confidence: 99%
“…Robinson equation are given byNichita et al (2007). Here, for the upper and lower limits of the box ,, min max min max T T P P , the same values shown in the Eqs.…”
mentioning
confidence: 99%