Browsing by Subject "Roughness"
Now showing items 1-6 of 6
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Distributed Roughness Receptivity in a Flat Plate Boundary Layer
(2014-04-18)Surface roughness can affect boundary layer transition by acting as a receptivity mechanism for transient growth. Several experiments have investigated transient growth created by discrete roughness elements; however, very ... -
In-flight Receptivity Experiments on a 30-degree Swept-wing using Micron-sized Discrete Roughness Elements
(2010-01-16)One of the last remaining challenges preventing the laminarization of sweptwings is the control of unstable crossflow vortices. In low-disturbance environments the transition from laminar to turbulent flow on the swept-wing ... -
Interference-based Investigation of Microscopic Objects Near Surfaces: a View From Below
(2013-11-26)Phenomena occurring when microscopic objects approach planar surfaces are challenging to probe directly because their dynamics cannot be resolved with a sufficiently high spatial/temporal resolution in a non-invasive way, ... -
Laboratory-scale fracture conductivity created by acid etching
(2009-05-15)Success of acid fracturing treatment depends greatly on the created conductivity under closure stress. In order to have sufficient conductivity, the fracture face must be non-uniformly etched while the fracture strength ... -
Parameters defining flow resistance and the friction factor behavior in liquid annular seals with deliberately roughened surfaces
(Texas A&M University, 2006-10-30)Non-contacting annular seals are internal sealing devices used in rotating machinery, such as multistage centrifugal pumps and compressors. Their design affects both efficiency and rotor stability. Traditional plain and ... -
Two Methods for the Computation of Commercial Pipe Friction Factors
(2005-08-01)Two methods are proposed for the computation of friction factors of commercial pipes. The first method applies the mean value of the zero velocity point (MZVP) to a theoretical friction factor equation, and the other ...