In this contribution, two approaches are followed to predict the saturated liquid density of liquefied natural gas (LNG) mixtures. In one approach, 12 cubic equations of state (EoSs), comprising the popular Peng-Robinson (PR) and Redlich-Kwong-Soave (RKS), are employed to predict the saturated liquid density of 20 LNG mixtures. In the other approach, these EoS are used in conjunction with a recently developed correlation to predict the liquid density of the same LNG mixtures. This correlation takes the advantages of the EoSs functions and is remarkably accurate for LNG mixtures. The results for both approaches are presented and the best predicting methods are ranked. Also the liquid density of 3 gas condensate mixtures are predicted using 10 EoSs and the results are compared with experimental data. The method employed is discussed and the best EoSs are ranked. Our evaluation indicates that in general, the EoSs used in this study are not accurate enough for predicting the liquid density of gas condensate mixtures. The PR, PATEL-TEJA (PT) EoSs or one of their variant are recommended, however

In this paper, the effect of tube diameter (Dp) in measurement of shear stress (tb) of the boundary layer wall was investigated under a zero pressure gradient. For this purpose, four different tubes with outside diameters of 3.2, 3.9, 4.7 and 6.3 mm were used which are corresponded to Dp/d of 0.039, 0.047, 0.057 and 0.076, respectively. Measurement of the pressure difference of static point and total in Preston tube was implemented using a differential pressure transducer with accuracy of 0.2 percent of the original scale. The results of the shear stress measurements around Reynolds numbers from 6.4´104 to 39.87´104 using PATEL and Bechert calibration equations showed that the Preston tube diameter has a significant impact on the shear stress estimation and both equations are sensitive to the tube diameter. The maximum value of difference in the shear stress measurementstb of different tubes using PATEL calibration is about 9%, while the Bechert calibration gives a maximum difference of approximately 14%. Comparing results obtained from both PATEL and Bechert calibration equations showed that variation in result of the two equations is minimum when the diameter Preston tube is 3.9 mm.

Making use of an extended fractional differintegral operator (introduced recently by PATEL and Mishra), we introduce a new subclass of multivalent analytic functions and investigate certain interesting properties of the subclass.

Ibuprofen solubility in supercritical carbon dioxide was measured using a dynamic apparatus at a pressure between 80 and 140 bars at three different temperatures, 308.15, 313.15 and 318.15 K. The mole fraction of Ibuprofen in fluid phase was in the range of 0.015 × 10-3 - 3.261 × 10-3 at the mentioned operational condition. Modified Mendez-Santiago and TEJA equation were used to check the consistency of the experimental data. Results were correlated using the Stryjek and Vera equation of state with the van der Waals 1-parameter (vdW1) and 2-parameters (vdW2) mixing and combining rules. Interaction parameters along with the percentage of the average absolute relative deviation (%AARD) were displayed. Also, the Lydersen group contribution methods were used for predicting the physicochemical and critical properties of the Ibuprofen.

Young's modulus of blends of thermoplastic polyurethane (TPU) and acrylonitrile butadiene styrene (ABS) are measured with different weight percentage (blend ratio). The results of the different micromechanical models prediction of Young's modulus، based on both droplet matrix and co-continuous morphology، are compared with experimental results. Both two-dimentisional models like series، parallel، Maxwell، Halpin-Tsai، Takayanagi، Davis، Coran and PATEL، and three-dimensional models like Kolarik، Barentson and Nijhof are used for Young's modulus prediction of polymer blends. In this work، an emphasis was given to the effect of weight percentage on morphology and mechanical properties of the blend. Scanning electronic microscopy shows droplet matrix morphology in the presence of less than 20 wg% ABS in TPU matrix but in 70/30 TPU/ABS blend ratio، ABS phase dispersed like elongated elliptical and phase inversion happened. In the 95/5، 90/10 and 80/20 blend ratio which ABS droplets dispersed uniformly throughout the TPU matrix، Parallel Takayanagi and Barentson series model of parallel parts، could predict Young's modulus with good accuracy. In the 70/30 blend ratio which phase inversion was observed and both phases are somehow continuous، Coran-PATEL، series Nijhof and Kolarik models were accurate.