Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Marbles tower shows conflict between oil and water

27.03.2007
How do oil and water really respond to each other? Up until now researchers could only study that in the lab. Dutch researcher Twan Gielen designed a simulation programme to study the interactions between oil and water outside of the laboratory. This provides insights into the behaviour of contaminated groundwater.

Scientists want to know how oil and water behave in the ground. The formula that describes this behaviour comes from the laboratory and assumes that oil and water are in balance. Then only the saturation of fluids plays a role. However in practice several factors play a role, for example, the time and location of the fluids. Gielen developed a model to simulate the reality at a microscale level. This model looks like a tower of small marbles.

Sand grains
The hollow marbles have a diameter of about 0.1 mm. The tower is thirty marbles wide, thirty marbles deep and forty marbles high. That is the maximum number that the computers can perform calculations on. The marbles represent the pore space between sand grains. The large cavities link the small pores together. Gielen's simulations gave a good picture of the distribution of the oil and water flows in the pore space.
Time
The key phenomenon in two-phase fluid dynamics research is the differential pressure between oil and water: capillary pressure. If you can calculate this pressure, you can determine how oil and water move with respect to each other. Gielen used his data to extend the traditional description of capillary pressure. With this description he could more realistically describe the behaviour of the two fluids. He was the first person to follow this behaviour over the course of time at this scale. In the future researchers want to make precise calculations about the movement of groundwater contamination.

Twan Gielen's research was funded by NWO.

Dr Twan Gielen | alfa
Further information:
http://www.nwo.nl/nwohome.nsf/pages/NWOA_6YSHPK_Eng

More articles from Ecology, The Environment and Conservation:

nachricht Bioinvasion on the rise
15.02.2017 | Universität Konstanz

nachricht Litter Levels in the Depths of the Arctic are On the Rise
10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>