Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

How new substances form

18.09.2013
Stuttgart researchers simulate processes in bubble column

Inside of a bubble column, gas bubbles rise in a liquid. While this happens, chemical processes take place at their outer layers where different substances are in contact. About 90 percent of all products of the chemical industry are generated in this way. These products are ultimately incorporated into a variety of goods such as cosmetics, clothing, plastic items (bottles, garbage bags, foils), as well as synthetic fuels, such as those used for the propulsion of ships or missiles.


Simulations reveal how chemical compounds are formed. Image source: SFB 716

Simulations are one way to better understand and optimize the process of formation of those chemical products. So far, scientists mostly modeled the circulation of gas bubbles and the induced fluid flow, using computer simulations. However, this approach only allows for limited predictions about varying process conditions.

This could be changed by particle simulations, which were developed at the Collaborative Research Center (SFB 716) focusing on “Dynamic Simulations of Systems with Large Numbers of Particles” at the University of Stuttgart. The research team led by Prof. Dr.-Ing. Ulrich Nieken at the Institute of Chemical Engineering concentrates its research efforts on the boundary layers of the gas bubbles, since this is where the actual chemical reactions take place.

The researchers develop computer simulations to test relevant factors such as column size, quantities of liquid, or different combinations of substances. By means of these simulations, they want to clarify important details like: Under what conditions do the desired reactions occur? What chemical phenomena play a role? What quantity of the final product can be produced, and how can these processes be accelerated to optimize throughput?

To achieve this, the researchers develop complex numerical calculation schemes for which they utilize high performance computer clusters or graphics cards. The methods developed by the scientists of the SFB are cutting edge in simulations of the described processes.

The current research results were published in July as part of a special issue of the journal “Chemie Ingenieur Technik" on bubble columns. “Chemie Ingenieur Technik” is the most important German-language magazine for process engineers, technical chemists, apparatus engineers, and biotechnologists.

Contact:
Prof. Dr.-Ing. Ulrich Nieken, University of Stuttgart, Institute of Chemical Process Engineering, phone: 0711/685-85230, E-Mail: ulrich.nieken(at)icvt.uni-stuttgart.de

Andrea Mayer-Grenu | idw
Further information:
http://www.uni-stuttgart.de

More articles from Life Sciences:

nachricht What the world's tiniest 'monster truck' reveals
23.08.2017 | American Chemical Society

nachricht Treating arthritis with algae
23.08.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

What the world's tiniest 'monster truck' reveals

23.08.2017 | Life Sciences

Treating arthritis with algae

23.08.2017 | Life Sciences

Witnessing turbulent motion in the atmosphere of a distant star

23.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>