Jens Honore Walther

Jens Honore Walther

Professor

DTU CONSTRUCT
Department of Civil and Mechanical Engineering

Section of Fluid Mechanics, Coastal and Maritime Engineering

Technical University of Denmark

Koppels Allé

Building 403, room 110

2800 Kgs. Lyngby

Ph.
Fax +45 45 25 19 61
E-mail jhwa@dtu.dk
ORCID 0000-0001-8100-9178
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News from DTU

2023
2022
14 JUL

Hairy flagellates have a clever way to overcome limitations of life at small scales

Flagellates live in a small-scale environment where viscosity impedes contact with their bacterial prey. Most flagellates use the active waving motion of a flexible flagellum with hairs to generate a feeding current. The presence of hairs significantly increases the force generated by the flagellum and also reverses its direction, hence...

22 APR

Flow through a bare sponge skeleton is not informative about how flow moves through live sponges

The deep-sea glass sponge Euplectella aspergillum is well known due to its beautiful lattice-work structure, and has attracted interest in its solid and fluid mechanical properties. In a recent paper, we argue that including sponge tissue is key in understanding the hydrodynamics of these beautiful animals, and an analysis of their hydrodynamics...

Fotograf: Peter Brøgger
02 FEB

Engineering science gains popularity in sailing

A large mathematical model of wind and water’s physical forces will help Team Danmark’s sailors to achieve top rankings internationally.

Construction and mechanics Ships and offshore constructions
2020
03 DEC

Sponge pumps and evolution of the sponge body plan

Pumping units in most sponges possess a gasket structure ensuring efficient pumping and filtration. However, some sponges lack such structure in their pumping units and it is an open question how they manage to pump and filter. In a recent eLife paper, we address this significant puzzle by demonstrating an unusual flow pattern that accomplishes...

2019
Frederik L. Zafiryadis wins this year's DANSIS graduate award
11 OCT

Winner of DANSIS Graduate Award 2019

Frederik L. Zafiryadis wins this year's DANSIS graduate award for his thesis "Numerical modeling of droplet trajectories in pilot plant spray dryer fitted with rotary atomizer".

Flagellates
10 JAN

Why are some flagellates living in a ribbon case?

Choanoflagellates are filter feeders and an important component of microbial foodwebs. Because they are theancestors of multicellular life, they have been intensely studied. Some species build an elaborate external ribbon structure. Its function is unknown but we demonstrate that it may significantly increase prey capture efficiency...

https://www.tkboe.aqua.dtu.dk/publications/person?id=7646&cpid=&tab=7
27 APRIL 2024