The specific objective of this paper is to develop a fully implicit compositional simulator for modeling asphaltene deposition during natural depletion. In this study, a mathematical model for asphaltene deposition modeling is presented followed by the solution approach using the fully implicit scheme. A thermodynamic model for asphaltene precipitation and the numerical methods for performing f...

Abstract We present a new family of fast and robust methods for the calculation vapor–liquid equilibrium at isobaric‐isothermal (PT‐flash), isochoric‐isothermal (VT‐flash), isenthalpic‐isobaric (HP‐flash), isoenergetic‐isochoric (UV‐flash) conditions. The framework is provided by formulating phase‐equilibrium conditions multi‐component mixtures in an effectively reduced space based on molar spe...

In order to study the influence of welding flash on heat transfer performance steel piston cooling gallery, pistons with different structures are studied. this paper, finite element simulation calculation and non-flash structure same model annular cavity section is carried out separately, amount carbon deposited in top gallery after 1000 hours test measured. The comparative analysis finds that ...

We investigate different methods used to construct (zero-age) horizontal branch models and compare the resulting horizontal branch evolution with that of models resulting from the calculation of the complete stellar evolution from the main sequence and through the core helium flash. We show that the approximate methods may lead to small, but discernible effects, but that some methods, which are...

this paper presents a new method to reduce consumption power in flash adc in 65nm cmos technology. this method indicates a considerable reduction in consumption power, by removing comparators memories. the simulations used a frequency of 1 ghz, resulting in decreased consumption power by approximately 90% for different processing corners. in addition, in this paper the proposed method was desig...

background : postmenopausal hot flash is a common disease amongst women with high prevalence of 75%. hormone replacement therapy (hrt) is a well-known relief of symptoms which has disadvantages such as side effects and contraindication for certain types of hormone related diseases and breast or estrogen related cancers. one of the alternatives is acupuncture which is an east asian and more spec...

Phase equilibrium calculations are an essential part of numerical simulations multi-component multi-phase flow in porous media, accounting for the largest share computational time. In this work, we introduce a fast and parallel framework, PTFlash, that vectorizes algorithms required two-phase flash calculation using PyTorch, can facilitate wide range downstream applications. Vectorization promo...

Introduction: Quantitative magnetic resonance imaging is a powerful tool for investigating a large variety of biological phenomena. Thus, big efforts have been made during the recent years in order to develop fast methods for the quantitative assessment of various MR parameters. Two very important parameters are the T1 and T2* relaxation times. Here a new method for the simultaneous measurement...