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Showing 1 to 20 of 27 for “"Rectangular Channels"”.
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Supersonic Corner Flows in Rectangular Channels
Rectangular channel geometries are widely encountered in supersonic flows, such as in wind tunnels and in aircraft inlets. Shock-boundary-layer interactions in these flows are known to exhibit significant three-dimensionality, due to the presence of sidewalls and associated corner boundary layers. …
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Nondimensional analysis of spatially varied flow in rectangular channels
… application of this nondimensional equation to rectangular channels of various roughness values. A rectangular channel with continuous flow was constructed in order to establish uniform flow. The channel roughness was altered by placing screen wire and wooden cubes in the channel. Manning …
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Effects of Coriolis on turbulent flow in rotating rectangular channels.
Thesis (M.S.)--Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1967.
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Topological Chaos and Mixing in Lid-Driven Cavities and Rectangular Channels
… investigated in lid-driven cavities and rectangular channels without internal rods. When a two-dimensional incompressible Newtonian flow is in the Stokes flow regime, the stream function satisfies the two-dimensional biharmonic equation. When the flow occurs in a lid-driven cavity with …
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Corner effects for oblique shock wave/turbulent boundary layer interactions in rectangular channels
In a rectangular cross-section wind tunnel a separated oblique shock reflection is set to interact with the turbulent boundary layer (oblique SBLI) both on the bottom wall and in the corner formed by the intersection of the floor with the side-walls. In such a scenario, shock-induced separation is …
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The effects of pressure waves on turbulent oblique shock wave boundary layer interactions in rectangular channels
… They often occur near to a side-wall, such as in rectangular intakes, which introduces a side-wall boundary layer. At the intersection of the primary surface and the side-wall, a thick corner boundary layer is formed containing low momentum which separates readily at an adverse pressure gradient. …
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The Effect of Electric Fields on Heat Transfer in Gas-Solid Suspensions Flowing in Rectangular Channels
Made available in DSpace on 2014-12-09T19:52:27Z (GMT). No. of bitstreams: 1 6915300.pdf: 4488788 bytes, checksum: a2f1a88d5985a8db051077b20da9c800 (MD5) Previous issue date: 1969
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Heat Transfer for High Aspect Ratio Rectangular Channels in a Stationary and Rotating Serpentine Passage with Turbulated and Smooth Surfaces
Heat transfer distributions are presented for a stationary three passage serpentine internal cooling channel for a range of engine representative Reynolds numbers. The spacing between the sidewalls of the serpentine passage is fixed and the aspect ratio (AR) is adjusted to 1:1, 1:2, and 1:6 by …
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Nondimensional approach to the design of open channels with spatially varied flow
… is developed which describes the flow profile in rectangular channels with spatially varied flow. This equation is solved for various slopes and rates of discharge. The results show that when the slope and roughness are constant the dimensionless profiles are also constant over a very wide range …
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An Experimental Investigation of Critical Heat Flux Performance of Hypervapotron in Subcooled Boiling
A non-dimensional CHF correlation for smooth rectangular channels and the hypervapotron channel was developed and compared with experimental data in this work. In addition, a hot-spot model was developed to give predictions of critical heat flux on both plain and hypervapotron surfaces. It was …
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Mesofluidic magnetohydrodynamic power generation
… well-developed MHD flows within circular and rectangular channels. Numerical simulations are used to elucidate the relationships derived theoretically and to enable future design without the reliance upon such simulation. Fabricated devices are experimentally observed to determine the …
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Computation of heat transfer in turbine rotor blade cooling channels with angled rib turbulators
… on heat transfer in rotating two-pass square and rectangular channels with smooth walls and walls with 45 degree angled and V-shaped rib turbulators were investigated numerically using an unstructured, incompressible, Reynolds-averaged Navier-Stokes flow solver. The influence of 45 degree angled …
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Turbulent fluid flow and heat transfer in annular passages with rough surfaces and moving cores.
… previous studies of turbulent flow in annuli and rectangular channels which were artificially roughened. The computer program developed for this study employs an iterative process to match velocity and temperature profiles with force and energy balances and calculates the desired momentum and …
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Friction pressure drop measurements and flow distribution analysis for LEU conversion study of MIT Research Reactor
… to develop empirical correlations for the finned rectangular coolant channels for the safety analysis of the MITR. A friction pressure drop experiment is set-up at the MIT Nuclear Reactor Laboratory, where static differential pressure is measured for both flat and finned coolant channels of …
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Precision hot-melt freeform 3D printing for monolithic multilayer microfluidics
… architecture include the requirement for rectangular channels of fixed height and the necessity of bonding multiple layers to make 3D constructs. The problem of fabricating networks of small tubes in diverse media is ubiquitous, yet there is still no “black box” that laboratories can buy …
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Velocity distribution prediction in rectangular and compound channels under smooth and rough flow conditions
… distributions in single and compound open channels. In this study, velocity distributions in rectangular and compound open channels under different flow regimes, in terms of roughness and turbulence conditions, were investigated experimentally and numerically. The detailed results from the …
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USING COMPUTATIONAL METHODS TO OPTIMIZE HIGH HEAT FLUX COMPONENT THERMAL PERFORMANCE IN MAGNETIC CONFINEMENT FUSION REACTOR RESEARCH
… of internally modified geometries in tubes and channels is an important mechanism to improve the survivability of components in extreme high-heat flux environments. Various features such as ribs and fins are studied using computational fluid dynamics in both uniform and one-sided heating in …
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Experimental investigation of local properties in two-phase fluid-flow hydrodynamics
… were made in a concurrent-flow, vertical rectangular channel (15.0 x 1.25 cm) having an aspect ratio of 12:1. Twenty (20) flows were analyzed with superficial gas and liquid velocities ranging from 0.04 to 0.40 m/s and 0.41 to 0.65 m/s, respectively; A dual-tipped optical-fiber probe was …
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Approximating three-dimensional fluid flow in a microfluidic device with a two-dimensional, depth-averaged lattice Boltzmann method
… coupled to fluid flow in MFDs that are shallow rectangular channels with regular or irregular interior pore structure. The success of these reactive transport models is dependent on accurate determination of the velocity field, because reaction is coupled to solute transport. The small aspect …
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Turbulence models for non-circular ducts and channels
… fully-developed flows in closed ducts and open channels of various cross-sectional geometries. Two different turbulence models were evaluated: a complete Reynoldsstress- transport model and a two-equation k-f model used in conjunction with a nonlinear stress-strain relationship. Detailed …
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