Summary: AN ABSTRACT OF THE THESIS OF
Mathieu Georges Charles Martin for the degree of Master of Science in
Mechanical Engineering presented on January 27, 2009.
Title: Numerical Study of Flow Maldistribution in Microchannels using
Fully Resolved Simulation
Sourabh V. Apte
This thesis addresses numerical simulation of flow maldistribution in
microchannels. Microchannels are often associated with two phase-flows which
can generate many problems such as plugging the channel or perturbing the flow.
In this study we have used CFD and fully resolved technique to simulate what
would happen in the case of bubbles modifying the flow in a 3 parallel
microchannels structure. Such perturbations in the domain have a significant
impact on the flow rate and on the flow distribution inside the geometry which
can cause many disorders in terms of heat exchange for example, where a
continuous mass flow rate is essential to be efficient.
To restore a nominal flow, valves are added to the geometry at the entrance of
each microchannel. These valves act separately and are operated by a controller
to regulate and eventually modify the flow to flush the bubbles out. The
controller makes its decision based on the mass flow rate data provided by