Simulation of liquid induced annulus wall boundary layer in a pipe flow, with dense net of jet cross flows

CFD simulation is conducted to analyse a development of a liquid wall annulus within a pipe flow and the liquid is introduced into the flow region with dense net of jet stream cross flows through the pipe wall. The concept behind this analysis is the idea that a thin liquid annulus could reduce scale deposite from a silica rich geothermal fluid. Topics related to this fluid dynamics analysis is advance mixing induced by cross flow, between free stream and jet stream, and multiphase flow. The CFD solver uses multiphase Eulerian model with pressure based Navier-Stokes equation and SST (k-omega) turbulence model. The effect of various boundary conditions on the annulus development was analysed. The jet streams‘ hole diameter and distribution density and core flow‘s velocity and density. Results of the simulations supported the development of water liquid annulus for both water liquid and vapor core flow. A high jet stream distribution density had more positive results than the jet stream hole diameter. The annulus was more succeptible to stratified pooling for low water vapor core velocity whereas low water liquid core velocity produced two ortho radial vortice pairs.

Author dc:creator

• Þórólfur Björn Einarsson 1981-

Contributors dc:contributor

• Háskólinn í Reykjavík

• Vélaverkfræði
• Straumfræði
• Tækni- og verkfræðideild
• Meistaraprófsritgerðir
• Mechanical Engineering
• Fluid mechanics
• School of Science and Engineering

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/1946/28843

OAI identifier oai:identifier

oai:skemman.is:1946/28843