PEES9AD TRANSFER PROCESSES IN MULTIPHASE MEDIA

PEES9AD

Transfer processes in multiphase media

Duration :
21 hours

ECTS Credits : 2

Semester : S9

Person(s) in charge :

Hervé Combeau, Professor, herve.combeau@univ-lorraine.fr

Keywords : Transfers between phases, multiphase flow, boiling, condensing

Prerequisites : Transport phenomena, fluid mechanics, thermodynamics

Objective:

Coupled transfers with or without phase change

Programm:

Transfers in polyphase media are current themes that concern large industrial production processes, or energy use, as well as the environmental sector.

In fact, industrial processes operate in polyphase systems more and more in order to increase selectivity, decrease reaction time (combustion, for example) and improve product separation (fluidized-bed catalytic reactor, scrubbers, etc.). Moreover, these flows appear during heat transfers with phase changes, notably with evaporation and condensation.

Students apply the knowledge they acquire during practical work and tutorials.

Content:

• Introduction
  • Industrial interests, examples.
  • Open questions in research and development.
  • Presentation of course program.
  • Different types of flow, state diagrams.
  • Introduction to bubble column used in practical work.
  • Distribution of articles to students.
• Multiphase modeling
  • Methods for taking the average (only hydrodynamic).
  • Averaged equations of linear momentum for each phase.
  • Numerical methods for finding solutions.
  • Tutorial: using Fluent on the computer. Example of the bubble column.
  • Taking averages with heat and mass transfer.
  • Tutorial (final): using Fluent on the computer. Example of the bubble column.
• Evaporation and condensation
  • Pool boiling.
  • Convective boiling.
  • Film and drop condensation.
  • Sizing an evaporator and a condenser.

Abilities : 

Levels

Description and operational verbs

Know 

The transfer phenomena when heat, mass and momentum are coupled and with or without phase change

Understand 

The benefit of implementing transfers with phase change and the pertaining issues. The difference with single phase transfers.

Apply 

Know how to size an evaporator or a condenser

Analyse 

Be capable of formulating the elementary phenomena that come into play in a real problem and know at least how to find the order of magnitude of these phenomena and what kind of model may lead to a solution

Summarise

Be capable of bringing an innovating solution on environmental problems and issues of reducing energy consumption

Assess

Evaluation :

• Written test

• Continuous Control

• Oral Report

• Project

• Written report