Data-driven method for optimized supply temperatures in residential buildings

The energy required for space heating amounts to approximately 68% of the total energy demand of existing buildings in Europe. The heat requirement of a building, and thus its carbon emission, can be lowered by optimizing the supply and return temperature of the heating system. A lower supply temperature enables a wider variety of transition...

Gas flow dynamics over a plunging breaking wave prior to impact on a vertical wall

We present an experimental study on the gas flow field development over a plunging breaking wave prior to impact on a vertical wall. The variability of wave impact pressure over repeated measurements is well known (Bagnold, 1939). The formation of instabilities on the wave crest are postulated to be the main source of impact pressure variability...

Variability in wave impacts: An experimental investigation

The prospect of stricter national and international emission standards for the shipping industry are a driving force in the search for alternative shipping fuels, such as liquefied natural gas (LNG). However, new challenges arise with the widespread use of LNG. For example, there is a desire to use LNG cargo containment...

Experimental investigation of wave tip variability of impacting waves

We present an experimental study on the variation in wave impact location and present a mechanism for the development of free surface instabilities on the wave crest for repeatable plunging wave impacts on a vertical wall. The existence of free surface instabilities on an impacting wave is well known, but their characteristics and formation...

Scanning stereo-PLIF method for free surface measurements in large 3D domains

In this work, we extend a planar laser-induced fluorescence method for free surface measurements to a three-dimensional domain using a stereo-camera system, a scanning light sheet, and a modified self-calibration procedure. The stereo-camera set-up enables a versatile measurement domain with self-calibration, improved accuracy, and redundancy...

Non-intrusive measurement of complex free surfaces using Laser Induced Fluorescence and stereo imaging

A quasi three-dimensional stereo-camera measurement technique has been devised that is able to measure liquid free surface profiles, by scanning a light sheet. The technique will be applied to study the variability of impact pressure observed during wave impact in a newly developed experimental set-up. The set-up imposes severe optical (single...

Droplet behaviour in a cavity mixing-layer

The transport of a dry gas through corrugated pipes can lead to flow-induced pulsations, which can result in tonal noise production and fatigue failure of the pipe or coupling. The unwanted effect can be prevented by increasing the liquid content. The effect of liquid on the one flow-induced pulsations is yet unknown, but one of the proposed...