Square cavity thermally driven by natural convection

This animation shows the solution obtained with the Open Source CFD code PETSc-FEM to the problem of the termally driven http://www.cimec.org.ar/petscfem natural convection of air in square cavity with differentially heated vertical walls. (see http://venus.ceride.gov.ar/twiki/bin/view/Cimec/PETScFEMResults)

Category:

Science & Technology

Tags:

• Computational
• Fluid
• Dynamics
• CFD
• finite
• elements
• square
• cavity
• thermal
• convection

[wiseyeffect]

@mariostorti can you make a simulation of thermal dynamic within a sphere of water then introduce either, cavitation, or cymatic frequencies. It would be interesting to see how the varies temps would react.

[mariostorti]

@wiseyeffect What do you mean for cavitation? Perhaps you want to mean boiling?

[sourcepanelmethod]

I am trying to model similar thermal stratification in a tank filled 75% with water and remaining 25% air. Can you help? I am using FLUENT and FLOW 3D.

[mariostorti]

@sourcepanelmethod That is a two-phase situation. Are you using a Volume Of Fluid (VOF) or Level-Set approach in Fluent) If you add heat to the water a natural convection will develop. Unless this convection is too strong I think that this will not disturb the free surface liquid-gas enough. So perhaps you can neglect the influence of the gas phase and simply model only the liquid.

[wiseyeffect]

@mariostorti I watch a video showing a microwave injected into a bubble of water. The cavitation that took place made me think of the big bang. I've been think of the universe as a void(cavitation) in a densier surrounding body. Could gravity be pressure from a densier outside influence supper impossing upon our universe? I'm interested in seen what you would come up with and would it reflect the model of the universe heat pattern and cooling tread?