Iwan, C House, Coorparoo, Brisbane

As seen from pool deck.

North-West elevation, C House, Coorparoo, Brisbane

As seen from pool deck, looking towards The Nest. Kitchen skylight above right.

Iwan, C House, Coorparoo, Brisbane

As seen from pool deck.

Iwan, C House, Coorparoo, Brisbane

View looking back at house from pool deck.

Iwan, C House, Coorparoo, Brisbane

As seen from pool deck.

Interior, C House, Coorparoo, Brisbane

View through bedroom interiors to windows on North-East elevation above pool deck.

Stone wall, C House, Coorparoo, Brisbane

Stone clad wall to filter room beside pool deck.

Timber-framed windows, C House, Coorparoo, Brisbane

Windows to North-East elevation, looking onto pool deck.

North-West elevation, C House, Coorparoo, Brisbane

As seen from pool deck. Concrete framework for The Nest on left.

Interior, C House, Coorparoo, Brisbane

View through bedroom interiors to windows on North-East elevation above pool deck.

Outdoor room, C House, Coorparoo, Brisbane

Looking towards pool deck, Hanging Basket top right.

Iwan, C House, Coorparoo, Brisbane

View of Iwan and part of North-west elevation, as seen from pool deck.

Iwan, C House, Coorparoo, Brisbane

As seen from pool deck.

North-West elevation, C House, Coorparoo, Brisbane

As seen from pool deck.

Air Entrainment Processes in a Full-Scale Rectangular Dropshaft at Large Flows

Rectangular dropshafts, commonly used in sewers and storm water systems, are characterised by significant flow aeration. New detailed air-water flow measurements were conducted in a near-full-scale dropshaft at large discharges. In the shaft pool and outflow channel, the results demonstrated the complexity of different competitive air entrainment mechanisms. Bubble size measurements showed a broad range of entrained bubble sizes. Analysis of streamwise distributions of bubbles suggested further some clustering process in the bubbly flow although, in the outflow channel, bubble chords were in average smaller than in the shaft pool. A robust hydrophone was tested to measure bubble acoustic spectra and to assess its field application potential. The acoustic results characterised accurately the order of magnitude of entrained bubble sizes, but the transformation from acoustic frequencies to bubble radii did not predict correctly the probability distribution functions of bubble sizes.