Direkte numerische Simulationvon Mischung und Turbulenz inzweidimensionalen Strömungen

Gerlinger, Wolfgang; Schneider, Kai; Bockhorn, Henning

doi:10.1002/1522-2640(200006)72:6<618::aid-cite618>3.0.co;2-#

Cited by 6 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Respective simulations illustrate clearly this effect as well as the inhomogeneity of the turbulence (Figure 9). 77 In each case a boundary layer initially exists between the two flows. This boundary layer is initially the site of maximum supersaturation.…”

Section: Theoretical Approachesmentioning

confidence: 99%

See 1 more Smart Citation

Organic Nanoparticles in the Aqueous Phase—Theory, Experiment, and Use

Horn

Rieger

2001

Angew. Chem. Int. Ed.

962

659

View full text Add to dashboard Cite

Many active organic compounds and organic effect materials are poorly soluble in water, or even insoluble. Aqueous forms of application thus require special formulation techniques to utilize or optimize the physiological (pharmaceuticals, cosmetics, plant protection, nutrition) or technical (varnishes, printing inks, toners) action. The most interesting properties of nanodispersions of active organic compounds and effect materials include the impressive increase in solubility, the improvement in biological resorption, and the modification of optical, electrooptical, and other physical properties which are achievable only with particle sizes in the middle or lower nanometer range (50–500 nm). Hence in addition to economic and ecological constraints there are also technical demands which appear to urgently require the development of new processes for the production of organic nanoparticles as alternatives to the established mechanical milling processes. In this context attention is drawn to the recent increase in research activities which have as their objective the continuous, automatic preparation of nanodispersed systems by precipitation from molecular solution. In this review the current state of knowledge of the fundamentals of particle formation from homogeneous solution and the effect of solvent and polymer additives on the morphology and supramolecular structure of the nanoparticle will be discussed. The practical implementation of this new formulation technology will be explored in detail for the carotenoids, a class of compounds of both physiological and technical interest.

show abstract

Section: Theoretical Approachesmentioning

confidence: 99%

“…Engineers in contrast have a results‐orientated approach to the problem, as documented, for example in the recently published, voluminous work from Baldyga and Bourne 76. Finally it is noted that in recent years computer‐supported solutions to fluid‐dynamics problems are gaining increasingly in importance 77, 86…”

Section: Theoretical Approachesmentioning

confidence: 99%

Organic Nanoparticles in the Aqueous Phase—Theory, Experiment, and Use

Horn

Rieger

2001

Angew. Chem. Int. Ed.

962

659

View full text Add to dashboard Cite

show abstract

“…Mit Mesovermischung bezeichnet man Mischvorg‰nge auf der L‰ngenskala von Millimetern; sie beruhen auf dem Zerfall von turbulenten Wirbeln in immer kleinere Wirbel bis viskose Kr‰fte gegen¸ber Tr‰gheitskr‰ften¸berwiegen. [77] AUFSATZ J. Rieger und D. Horn t À1/4 . In Abbildung 8 sind die Vorg‰nge beim turbulenten Mischen auf der Skala der Mikrovermischung skizziert.…”

Section: Partikelbildung Durch Mischen Zweier Komponentenunclassified

“…Polemisch kˆnnte man es so formulieren: Chemiker sind zufrieden, wenn sie unter definierten experimentellen Bedingungen einen definierten Endzustand in Form von dispersen Nanopartikeln pr‰parieren kˆnnen. [77,86] [85] Ingenieure hingegen gehen das Problem ergebnisorientiert an, dokumentiert beispielsweise in einem volumi-nˆsen Werk von Baldyga und Bourne.…”

Section: Partikelbildung Durch Mischen Zweier Komponentenunclassified

Organische Nanopartikel in wässriger Phase - Theorie, Experiment und Anwendung

2001

View full text Add to dashboard Cite

“…Entsprechende Simulationen veranschaulichen diesen Effekt und auch die Inhomogenität der Verwirbelungen deutlich (Abbildung 9). 77 In jedem Fall existiert zunächst eine Grenzschicht zwischen den beiden Strömen. Diese Grenzschicht ist zunächst der Ort maximaler Übersättigung.…”

Section: Theoretische Ansätzeunclassified