A Problem of Robinson

Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction Coefficients

For some of the EOS models the dimension of equilibrium problem can be reduced. Stability and difficulties in implementation are among the problems of flash calculation. In this work, a new reduction technique is presented to prepare a reduced number of equilibrium equations. Afterwards, a number of appropriate solution variables are selected for the prepared equation system to solve the equati...

Surface Tension Prediction of n-Alkanes by a Modified Peng-Robinson Equation of State Using the Density Functional Theory

Through this study, the ability of a modified Peng-Robinson (MPR) equation of state in predicting the surface tension of n-alkanes based on the density functional theory approach was investigated and compared with other studies. The interfacial layer thickness and the density profile were calculated simultaneously at different temperatures from triple point to near critical point using the modi...

a sequential formulation for compositional reservoirs simulation using peng robinson equation of state

Modification of the Peng-Robinson Equation of State (Generalization)

A modification of Peng-Robinson equation is described wherein in the parameter b is expressed as a linear function of temperature. The modified equation is then applied to a series of light hydrocarbons and refrigerants, and predicted values for vapor pressure, saturated vapor volume, saturated liquid volume and the heat of evaporation are compared with the corresponding experimental data. ...

تأثیر کود بیولوژیک فسفر بارور 2 و سوپر فسفات تریپل بر عملکرد، کیفیت و جذب عناصر در یونجه یکساله گونه اسکوتالاتا (Medicago scutellata, cv. Robinson)

In order to study the effects of phosphate biofertilizer Barvar 2 and triple super phosphate fertilizer on yield, quality and nutrient uptake in Medicago scutellata, cv. Robinson, a field research work was done in the Research Field of Agricultural College, Shahed University, located in Tehran, Qom highway in 2006. The treatments included phosphate biofertilizer Barvar 2 at two levels including...

نقش سبک فرزندپروری مادران در پیش‌بینی مشکلات رفتاری کودکان پیش‌دبستانی با کم‌توانی‌ذهنی

The aim of present study was to predict behavior problems of preschool children with intellectual disability based on parenting style of their mothers. This descriptive study is correlational. The statistical population of this research includes the whole mothers of preschool children with intellectual disability in Shiraz city. The sample size was 58 mothers of preschool children with intellec...