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Book Air and Gas Drilling Manual

Download or read book Air and Gas Drilling Manual written by William C. Lyons and published by Gulf Publishing. This book was released on 1984 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Numerical Prediction of Flow Heat Transfer Turbulence and Combustion

Download or read book Numerical Prediction of Flow Heat Transfer Turbulence and Combustion written by D. Brian Spalding and published by Elsevier. This book was released on 2015-07-14 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical Prediction of Flow, Heat Transfer, Turbulence and Combustion: Selected Works of Professor D. Brian Spalding focuses on the many contributions of Professor Spalding on thermodynamics. This compilation of his works is done to honor the professor on the occasion of his 60th birthday. Relatively, the works contained in this book are selected to highlight the genius of Professor Spalding in this field of interest. The book presents various research on combustion, heat transfer, turbulence, and flows. His thinking on separated flows paved the way for the multi-dimensional modeling of turbulence. Arguments on the universality of the models of turbulence and the problems that are associated with combustion engineering are clarified. The text notes the importance of combustion science as well as the problems associated with it. Mathematical computations are also presented in determining turbulent flows in different environments, including on curved pipes, curved ducts, and rotating ducts. These calculations are presented to further strengthen the claims of Professor Spalding in this discipline. The book is a great find for those who are interested in studying thermodynamics.

Book Proceedings SPE Annual Technical Conference and Exhibition

Download or read book Proceedings SPE Annual Technical Conference and Exhibition written by Society of Petroleum Engineers (U.S.). Technical Conference and Exhibition and published by . This book was released on 1988 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Numerical Simulation of Flow and Heat Transfer in Internal Multi Pass Cooling Channel Within Gas Turbine Blade

Download or read book Numerical Simulation of Flow and Heat Transfer in Internal Multi Pass Cooling Channel Within Gas Turbine Blade written by Hung-Chieh Chu and published by . This book was released on 2013 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results from numerical simulation were performed to study flow and heat transfer in two types of rotating multi-pass cooling channels. Second moment closure model was used to solve flow in domain generated from Chimera method. The first type was a four-pass channel with two different inlet settings. The main flowing channel was rectangular channel (AR=2:1) with hydraulic diameter (Dh ) equals to 2/3 inch (16.9 mm). The first and fourth channel were set as different aspect ratio (AR=2:1; AR=1:1). Reynolds number (Re) used in this part was 10,000. The rotating angle was set as 90 degrees. The density ratio was set as 0.115. The rotation number varied from 0.0 to 0.22. It was showed that inlet effect only caused influence to flow and heat transfer in first two passages. The second type was a four-pass channel with/without addition of vane in smooth turn portion. The main flowing channel was rectangular channel (AR=2:1) with hydraulic diameter (Dh) equals to 2/3 inch. The first and fourth passages were set to be square duct (AR=1:1). The Reynolds number (Re) used in this part was 20,000. Three rotation numbers were set here (Ro=0.0; Ro=0.2; Ro=0.4). The density ratio and rotating angle varied from 0.12 to 0.32 and from 45 degrees to 90 degrees respectively. According to numerical results, it was revealed that the addition of vane in smooth turn portion did not cause influence to part before it. However, it caused significant influence to flow and heat transfer in smooth turn portion and part after it. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148242

Book Hydraulic Downhole Drilling Motors

Download or read book Hydraulic Downhole Drilling Motors written by W. Tiraspolsky and published by . This book was released on 1985 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Numerical Simulation of Heat Transfer and Fluid Flow Processes

Download or read book Numerical Simulation of Heat Transfer and Fluid Flow Processes written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Numerical Simulation of the Flow Field and Heat Transfer in a Rectangular Passage with a Turbulence Promoter

Download or read book A Numerical Simulation of the Flow Field and Heat Transfer in a Rectangular Passage with a Turbulence Promoter written by and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical study of the flow field and heat transfer in a turbine blade control cooling passage is described. Attention is focused on a short straight section of the rectangular passage which includes a single turbulator protruding from its floor. The two dimensional, transient, Reynolds averaged Navier Stokes, continuity and energy equations are iterated to a steady state solution using the MacCormick explicit predictor-corrector algorithm. Turbulence closure is achieved through the use of the Baldwin-Lomax form of the Cebeci-Smith algebraic two layer eddy viscosity model. Plots of skin friction, local heat transfer rate, streamlines, velocity profiles and temperature profiles are given. It was found that the widely used Reynolds Analogy greatly underpredicts the heat transfer rate as given by a direct calculation using Fourier's law. Keywords: Heat transfer, Turbulence augmentation. (mjm).

Book Pneumatic Transport Modeling of Air Gas Drilling Hydraulics in Horizontal and Deviated Wellbores

Download or read book Pneumatic Transport Modeling of Air Gas Drilling Hydraulics in Horizontal and Deviated Wellbores written by Najeem Adeleke and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimal design of any drilling program requires a strong knowledge of drilling hydraulics. Field drilling technicians and drilling engineers designing air/gas drilling projects both typically need to know (1) the time it takes to circulate out a pill of formation material at any given depth in order to reduce drilling time (thereby reducing the cost of drilling); and (2) the optimum rate at which to flow the circulation fluid to ensure the hole is maintained free of cuttings at the minimum capacity (and thereby cost) of surface equipments. While there have been substantial studies and some established techniques for wellbore hydraulics design/analysis for conventional mud drilling, this is not the case for air/gas drilling.To this end, a transient numerical pneumatic transport model has been developed to study air/gas drilling hydraulics. This model is based on a mono-dispersed particulate two-fluid model (TFM). The mathematical representation of the problem involves the solution to coupled non-linear hyperbolic PDE's and therefore a detailed review of monotone and higher resolution schemes for hyperbolic systems is presented. Two hyperbolic model equations: (1) The benchmark Euler equation (2) The mono-dispersed particulate Two Fluid Model (TFM) equation, are presented along with analytical expressions for their decomposed characteristics. The Euler equation is used to demonstrate the efficacy of the numerical schemes discussed. The most efficient numerical scheme is then applied to solve the TFM equation. Numerical results compared to experimental data were satisfactory.The experimental work of Temple was used to evaluate the model for annular vertical wellbore air drilling flow conditions. Flow characteristic curves (FCC) that cover both dilute and dense phase flow conditions were generated. Simulation results showed a good match with experiments. While matching the data points in the dilute phase flow region was less precise towards the extreme end of the larger particles, the optimum flow velocity was still accurately predicted at 9.1 %AAD.Unlike vertical flow, air drilling experiments for horizontal flow pneumatic transport are difficult to come by. This applies to industry field data as well as they are usually incomplete and typically labeled as confidential information. Therefore horizontal pneumatic transport studies for food processing applications were used to evaluate the performance of the current model for horizontal and highly-deviated well systems. The area ratio correlations were incorporated into the TFM to account for the lower-side deposition and re-entrainment phenomenon peculiar to horizontal wells. While we were able to show a match in the FCC plots in the dilute flow region, it was difficult to establish a match for the dense phase region of the FCC plot. Predicted pressure drops in dense flow region of the FCC plot for horizontal systems were significantly lower than experiment. This was due to the inability of the current model formulation to account for slug flow regime typical of horizontal pneumatic transport systems transitioning from dilute to dense flow conditions.Overall, it was observed that the model is capable of predicting volumetric rate requirements and circulation time for hole cleaning in vertical wells. The model is also capable of estimating cutting circulation time in horizontal and deviated well sections while in dilute flow conditions only. However, the model was unable to accurately simulate the inherent transient behaviors expected under dense horizontal pneumatic transport. More studies need to be conducted in the area of constitutive relations specific to horizontal pneumatic transport flow regimes and empirical relations for the prediction of critical velocities. These will provide the capability of upgrading the current model for the prediction of fluid volumetric rate requirements in horizontal/highly-deviated well sections particularly under dense flow conditions.The transient model was also used to predict circulation time for dispersed slugs of cuttings from the bottom of a well with both vertical and horizontal sections. The model results can only be trusted to predict accurately when the flow in the horizontal section is maintained within the dilute flow region. In order to ensure that the flow in the horizontal section is maintained above flow condition, we developed correlations for optimum circulation velocity using three distinct data sets for both vertical and horizontal pneumatic transport systems in the literature. Our results showed a relative error less than 10 % for most data points and RMSRD less that 5.1 %.

Book Numerical Analysis of Heat Flow

Download or read book Numerical Analysis of Heat Flow written by George Merrick Dusinberre and published by . This book was released on 1949 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Numerical Simulation of Heat Transfer in the Drive Plate of a Nutating Engine

Download or read book Numerical Simulation of Heat Transfer in the Drive Plate of a Nutating Engine written by Sunilkumar Patil and published by . This book was released on 2003 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Heat Transfer and Fluid Flow in Rotating Machinery

Download or read book Heat Transfer and Fluid Flow in Rotating Machinery written by Wen-Jei Yang and published by Springer. This book was released on 1987 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Numerical Simulation of Borehole Temperature Distributions While Drilling

Download or read book A Numerical Simulation of Borehole Temperature Distributions While Drilling written by Richard Eugene Bennett and published by . This book was released on 1970 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: