다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

The Analysis of Variance.

Thermophysical Properties Research Literature Retrieval Guide Edited by Y. S. Touloukian, J. K. Gerritsen and N. Y. Moore Second edition, revised and expanded. Book 1: Pp. xxi + 819. Book 2: Pp.621. Book 3: Pp. ix + 1315. (New York: Plenum Press, 1967.) n.p.

/pdf/heat-and-mass-transfer-1yaijfx8vp.pdf

Heat and Mass Transfer

Computational Fluid Dynamics: Principles and Applications, Third Edition presents students, engineers, and scientists with all they need to gain a solid understanding of the numerical methods and principles underlying modern computation techniques in fluid dynamics By providing complete coverage of the essential knowledge required in order to write codes or understand commercial codes, the book gives the reader an overview of fundamentals and solution strategies in the early chapters before moving on to cover the details of different solution techniques

	This updated edition includes new worked programming examples, expanded coverage and recent literature regarding incompressible flows, the Discontinuous Galerkin Method, the Lattice Boltzmann Method, higher-order spatial schemes, implicit Runge-Kutta methods and parallelization

	An accompanying companion website contains the sources of 1-D and 2-D Euler and Navier-Stokes flow solvers (structured and unstructured) and grid generators, along with tools for Von Neumann stability analysis of 1-D model equations and examples of various parallelization techniques



	
		Will provide you with the knowledge required to develop and understand modern flow simulation codes
	
		Features new worked programming examples and expanded coverage of incompressible flows, implicit Runge-Kutta methods and code parallelization, among other topics
	
		Includes accompanying companion website that contains the sources of 1-D and 2-D flow solvers as well as grid generators and examples of parallelization techniques

Computational Fluid Dynamics: Principles and Applications Ed. 3

The quality of two-equation eddy-viscosity models is studied for non-premixed turbulent gas combustion in an axisymmetric co-flow burner. Non-linear extensions of low-Reynolds versions of two-equation turbulence models have been made. Both k − e and k −ω based turbulence models are studied. First order non-linearity in the constitutive law for the Reynolds stresses has been introduced on the basis of realizability. Realizability is obtained by introducing a dependency of the eddy-viscosity on local flow velocity gradients. The main advantage of non-linear eddy-viscosity models is that they describe the flowfield more accurately than their linear counterparts without rather 'ad hoc' adjustments of model constants. Differences between results from high-and low-Reynolds versions are small in the cases studied. Results are presented for an axisymmetric free jet, followed by results for an inert mixing jet. Finally, results for reacting jet are given. The realizable models always provide the best results.

Realizable eddy-viscosity turbulence models in turbulent reacting flows.

The study evaluates OpenFOAM's adaptive mesh refinement (AMR) capabilities and accuracy when applied to numerical simulations of turbulent buoyant flows. To this purpose, large eddy simulations of Sandia's turbulent helium plume test case are considered, a scenario with similar characteristics (in terms of air entrainment and vortex shedding) to those encountered in large‐scale fires. Comparison is made of the relative accuracy (in terms of both first and second order statistics), the predicted puffing frequencies and the computing times of numerical simulations using AMR and static meshes. Additionally, a sensitivity study on different AMR parameters is conducted and an evaluation of the performance of the dynamic Smagorinsky model when combined with AMR is made. Overall, the predictions of AMR are very satisfactory, in terms of both accuracy and computing times, compared to the use of static meshes of different sizes. Nevertheless, it is observed that a careful choice of a static mesh can result in equally accurate predictions with comparable, or even smaller, computing times than AMR for the case at hand. Additionally, the use of AMR slightly modified the entrainment characteristics in the near‐field region of the plume and (significantly) altered some of the, dynamically determined, turbulence model parameters.

/pdf/analysis-of-adaptive-mesh-refinement-in-a-turbulent-buoyant-gtvb7ekt.pdf

Analysis of adaptive mesh refinement in a turbulent buoyant helium plume

On the use of natural and forced convection correlations in predictive CFD simulations of liquid pool fires

Many researchers use a set of small-scale atrium experiments to develop formulae for smoke and heat exhaust ventilation systems. They correspond to large-scale atria via Froude-scaling. A similar study can be performed with numerical simulations, where a small-scale setup can be scaled up to compare the results. However, with numerical simulations as well as in experiments, proper scaling is necessary. This paper discusses the dimensionless numbers for scaling. The simulations confirm that scaling based on Froude-number alone seems allowed as long as the flows in all configurations are sufficiently turbulent.

/pdf/on-the-use-of-small-scale-results-for-the-design-of-3w5jf7x1uy.pdf

Bart Merci

Papers

Realizable eddy-viscosity turbulence models in turbulent reacting flows.

Analysis of adaptive mesh refinement in a turbulent buoyant helium plume

On the use of natural and forced convection correlations in predictive CFD simulations of liquid pool fires

On the use of small-scale results for the design of ventilation systems in large-scale atria

Two-equation very-large-eddy simulation subgrid modelling with the renormalization group