Reply To: Simulation of a storage in a lake – Which tool should be used?

[Rob]

OK, thanks. Given the membrane insulation you may want to look at modelling just the warm side and use literature to find the external HTC for use in Fluent. There are too many factors to want to try and model the whole thing (hot and cold side) at once, not least baffles, external dimensions etc.  

Re the deformation. If you work out the volume at 80C and again at ambient temperature is there enough change in density to make a difference?