Sökning: "Luca Brandt"

Visar resultat 1 - 5 av 28 avhandlingar innehållade orden Luca Brandt.

1. 1. Study of generation, growth and breakdown of streamwise streaks in a Blasius boundary layer

   Författare :Luca Brandt; KTH; []
   Nyckelord :Fluid mechanics; laminar-turbulent transition; boundary layer flow; transient growth; streamwise streaks; lift-up effect; receptivity; free-stream turbulence; streak instability; secondary instability; Direct Numerical Simulation.;

   Sammanfattning : Transition from laminar to turbulent flow has beentraditionally studied in terms of exponentially growingeigensolutions to the linearized disturbance equations.However, experimental findings show that transition may occuralso for parameters combinations such that these eigensolutionsare damped. LÄS MER

3. 2. Numerical studies of bypass transition in the Blasius boundary layer

   Författare :Luca Brandt; KTH; []
   Nyckelord :Fluid Mechanics; laminar-turbulent transition; boundary layer flow; transient growth; streamwise streaks; secondary instability;

   Sammanfattning : Experimental findings show that transition from laminar toturbulent ow may occur also if the exponentially growingperturbations, eigensolutions to the linearised disturbanceequations, are damped. An alternative non-modal growthmechanism has been recently identi fied, also based on thelinear approximation. LÄS MER

4. 3. Numerical study of particle suspensions in Newtonian and non-Newtonian fluids

   Författare :Dhiya Alghalibi; Luca Brandt; Metin Muradoglu; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; inertial suspensions; rheology; non-Newtonian fluids; visco-elastic; sedimentation; deformable particle; hyper-elastic.; tröghetsbehäftad suspension; reologi; icke-Newtonska fluider; vis- koelastik; sedimentering; deformerbara partiklar; hyperelastik; Engineering Mechanics; Teknisk mekanik;

   Sammanfattning : Solid or deformable particles suspended in a viscous fluid are of scientific and technological interest in a broad range of applications. Pyroclastic flows from volcanoes, sedimentation flows in river bed, food industries, oil-well drilling, as well as blood flow in the human body and the motion of suspended micro-organisms in water (like plankton) are among the possible examples. LÄS MER

5. 4. Simulation of deformable objects transported in fluid flow

   Författare :Arash Alizad Banaei; Luca Brandt; Markus Holzner; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Mechanics; Teknisk mekanik;

   Sammanfattning : Deformable particles suspended in a viscous fluid can be found in many industrial and biological applications. In this thesis, two different numerical tools have been developed to simulate suspensions of capsules, thin membranes enclosing a second fluid and a rigid nucleus so to work as model for ”Eukaryotic” cells, and flexible slender bodies known as filaments/fibres. LÄS MER

7. 5. Point of care microfluidic tool development for resource limited settings

   Författare :Indradumna Banerjee; Aman Russom; Luca Brandt; Gustaf Mårtensson; Jens Ducrée; KTH; []
   Nyckelord :Blood; control; cell separation; centrifugal microfluidics; diagnostics; elasto-inertial; hematocrit level; microfluidics; neonatal diagnostics; nucleic acid quantification; point of care; particle focusing; resource limited settings.; Bioteknologi; Biotechnology;

   Sammanfattning : The development of point of care diagnostics using recent advances in microfluidics have the potential to transform health care in several ways, especially in resource limited settings with limited access to advanced health care infrastructure. However, translating a point of care device to reality is often a challenging task because of the complexities involved in integrating a number of diverse engineering concepts into an easy to use, accurate and portable device. LÄS MER