Sökning: "Modal and non-Modal Stability"

Hittade 2 uppsatser innehållade orden Modal and non-Modal Stability.

1. 1. Linear stability Analysis of Viscoelastic Flows

   Master-uppsats, KTH/Mekanik

   Författare :Mengqi Zhang; [2012]
   Nyckelord :;

   Sammanfattning : The goal of present work is to investigate the instability of jet ow, mixing layer and Poiseuille ow of viscoelastic uids. According to Boeta et al: [4], small elastic eect in Kolmogorov ow will result in increasing critical Re for hydrodynamic instability, however, at high elasticity a new instability of elastic nature occurs even at vanishing Re. LÄS MER

3. 2. Instabilities in Pulsating Pipe Flow of Shear-Thinning and Shear-Thickening Fluids

   Master-uppsats, Mekanisk värmeteori och strömningslära; Tekniska högskolan

   Författare :Sasan Sadrizadeh; [2012]
   Nyckelord :Stability; Pulsatile pipe; Transient Growth; Floquet Multiplier; Modal and non-Modal Stability;

   Sammanfattning : In this study, we have considered the modal and non-modal stability of fluids with shear-dependent viscosity flowing in a rigid straight pipe. A second order finite-difference code is used for the simulation of pipe flow in the cylindrical coordinate system. The Carreau-Yasuda model where the rheological parameters vary in the range of 0. LÄS MER