Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 48 for “"backward facing step"”.
-
Mixed convection in laminar/turbulent separated backward-facing step flows
… laminar/turbulent flow in a duct with a backward-facing step are reported. The two walls forming the duct are maintained at uniform but different temperatures. The straight wall is maintained at the inlet air temperature, while the downstream section of the stepped wall is heated to a …
-
Low Reynolds Number Laminar Separation Bubble Control Using a Backward Facing Step
… airfoil and a modified LRN-010 airfoil with a backward facing step on its upper surface were built and tested in the ERAU wind tunnel in order to obtain pressure distributions and drag for different angles of attack.</p> <p>Results were found to be in good agreement with the results obtained …
-
An experimental investigation of the flow over a double backward facing step
… investigation of the flow over a double backward facing step is carried out in an attempt to show if it is justified to assume two-dimensional flow, as most investigators have done, or if in fact one must consider the three-dimensional aspects of such a flow. The results are compared with …
-
Near wall reaction effects on film-cooled backward-facing step heat transfer
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
-
Experimental verification of model-based control strategies using a backward-facing step combustor
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, June 2003.
-
Base Pressure Problems Associated With an Axisymmetric Transonic Flow Past a Backward Facing Step
Made available in DSpace on 2014-12-13T19:55:27Z (GMT). No. of bitstreams: 1 7804072.pdf: 3116092 bytes, checksum: c4888928ad717df358d1660e293794c7 (MD5) Previous issue date: 1977
-
Investigation of Particle Velocity and Drag with Spherical and Non-Spherical Particles Through a Backward Facing Step
… in velocity known as velocity slip. Flow over a backward facing step provides a well characterized, turbulent, decelerating flow useful for measuring the relative velocities of the solid and gaseous phases in order to determine velocity slip and particle drag. Numerous investigations have been …
-
Implementation of 3DPTV for turbulence analysis and subgrid-scale stress model testing of a backward-facing step flow
… as it was applied in micro-scale systems, to a backward-facing step flow in a small-scale water tunnel testing facility. The camera system, consisting of three 4008 $\times$ 2672 CCDs, was aligned and calibrated using a custom grid and dot target plate mounted on a purpose-built rig, containing …
-
Study of two-way coupled particle laden turbulent flow over a backward-facing step using large-eddy simulation
… coupled particle-laden turbulent flow over a backward-facing step. We consider dynamic eddy viscosity, wall-adapting local eddy viscosity (WALE), and dynamic one-equation models for the closure of the SGS stress tensor, and the random walk (RW) and the differential filter (DF) based models for …
-
Aerodynamics of a Transonic Turbine Vane with a 3D Contoured Endwall, Upstream Purge Flow, and a Backward-Facing Step
… with upstream purge flow. All cases had a backward-facing step upstream of the vanes. Five-hole probe measurements were taken 0.2, 0.4, and 0.6 Cx downstream of the vane row trailing edge, and were used to calculate loss coefficient, secondary velocity, and secondary kinetic energy. …
-
The influence of buoyancy upon near wake pollutant dispersal
… pollutant and two wake producing objects: a backward facing step, which acts a simple and canonic representation of a wake, and an Ahmed body, which acts as a simplified representation of a road passenger vehicle. There are six fundamental parameters which can be used to characterise the …
-
Numerical Prediction of Three-Dimensional Incompressible Recirculating Flows
… bifurcation and turbulent flow over a backward-facing step, using finite-differences and the Navier-Stokes equations in primitive variables.
-
Aerodynamic Investigation of Upstream Misalignment over the Nozzle Guide Vane in a Transonic Cascade
… guide vane passage was concentrated on the backward-facing step of upstream misalignments. The tests were performed using two types of vane endwall platforms in a 2D linear cascade: flat endwall and axisymmetric converging endwall. The test conditions were a Mach number of 0.85, Re_ex …
-
Extension to Multiple Species of a Two-Equation Turbulence Model for High Speed Flows
… been performed, including a Mach 2.5 flow past a backward-facing step and a Mach 2.85 flow into a 24° compression corner. For the backward-facing step simulation, the surface pressure has a maximum error of 63% in the separation region, less than 5% error after the flow reattaches, and an RMS …
-
Continuum Sensitivity Analysis for Shape Optimization in Incompressible Flow Problems
… and Ramage is used. Meshes are produced for a backward-facing step problem, using built-in tools from IFISS as well as the mesh generation software Gmsh, and grid convergence studies are performed for both sets of meshes along a sampled data line to ensure that the simulations converge …
-
Efficient solutions of 2-D incompressible steady laminar separated flows
… and nonuniform grids and for the flow past a backward facing step in a channel.
-
Sensitivity analysis on chaotic dynamical systems by Non-Intrusive Least Squares Shadowing (NILSS)
… 63 system and a CFD simulation of flow over a backward-facing step. In both cases, the sensitivities computed by NILSS reflect the trends in the long-time averaged objectives of dynamical systems.
-
Large eddy simulations of premixed turbulent flame dynamics : combustion modeling, validation and analysis
… algebraic models. Additionally, a multiple-step combustion chemistry mechanism is used for the simulations. Secondly, the presumed-PDF approach, coupled with the flamelet generated manifold (FGM) technique, is also implemented for modeling turbulence-combustion interactions. The proposed …
-
Implementation and Validation of the ζ-F and ASBM Turbulence Models
… standard. Simulations are used during nearly all steps throughout the life cycle of products including design, production, and testing. Due to their wide range of use, industrial CFD codes are becoming more flexible and easier to use. These commercial codes require robustness, reliability, and …
-
Adaptive finite element simulation of incompressible viscous flow
… method. In two-dimensions, flow over a backward facing step and flow in a cavity are investigated. In three-dimensions, the problems include flow in a cavity at Reynolds number 100 and 1000, and flow in a curved duct. The simulation compares very well with previously reported data, where …
Page 1 of 3