Gas–Liquid Systems

The performance and structural integrity of gas–liquid systems can be greatly enhanced using ANSYS solutions. Engineers trust ANSYS fluid mechanics software to model systems with or without heat and mass transfer/reaction in a broad range of applications in which fluid and gases are transported or processed.

Gas–liquid mixing and reactions are critical capabilities in many industries, including chemical, biochemical, petroleum and mining. Engineers in these industries are challenged to design  vessels that increase contact between gases and liquids or help separate phases. The dispersed phase can be gas or liquid, with or without additional phases. Engineers use internal appendages and sparger injection systems to enhance gas–liquid contact by influencing bubble size and distribution, flow paths, resident time, and other process requirements. Businesses within this industry place stringent demands on gas–liquid mixing systems, as these vessels often operate under pressure — and must withstand the effects of vibration, thermal stress and varying loads.

Argon bubble after deformation and breakup in molten steel bath

Courtesy Stellenbosh University.

Changes in vessel design may necessitate geometrical changes to distributors, baffles, vessel walls, splitter plates, inlet and outlet locations, draft tubes, recirculation loops, manifolds, distribution plates, and other components. The task of gas–liquid process and vessel design is a particularly complex engineering challenge.

Engineers are also tasked with designing and improving gas–liquid contacting systems, which transfer mass, heat and momentum between phases subject to physical and chemical equilibrium. The challenge of the process equipment designer is to achieve appropriate transfer with minimal energy and capital investment. Examples of typical mass transfer devices are distillation, flashing, absorption, stripping, evaporation, humidification, dehumidification and spray drying.

ANSYS solutions can help engineers overcome these challenges through computational fluid dynamics (CFD) and structural analysis to account for thermal stresses, vibration, fatigue, reactor performance, distribution of gases or liquids for various components, and mechanical design. ANSYS simulation enables engineers to study multiphase distribution, heat and  mass transfer calculations, chemical kinetics and reaction of gas–liquid reactions.

Applications for ANSYS software include:

  • Design of plate columns, packed columns and bubble columns
  • Loop reactor and bioreactor development
  • Gas-in-liquid dispersion studies
  • Emulsion design
  • Foam analyses
  • Surface aeration studies
  • Droplet separation studies
  • Mist eliminator design
  • Impingement separation studies