• Aucun résultat trouvé

Is there an optimum size of fish gills lamella ?

N/A
N/A
Info
Télécharger
Protected

Academic year: 2022

Partager "Is there an optimum size of fish gills lamella ?"

Copied!
4
0
0

Chargement.... (Voir le texte intégral maintenant)

Texte intégral

(1)

K. Park et al., Optimal lamellar arrangement in fish gills, PNAS 111, 8067 (2014)

Is there an optimum size of fish gills lamella ?

(2)

K. Park et al., Optimal lamellar arrangement in fish gills, PNAS 111, 8067 (2014)

Scaling laws for lamella spacing and length

d ~ l1/2 d ~ M1/6

(3)

Typical sizes d ~ 50 μm H ~ 400 μm

l ~ 1 mm

D02 ~10-9 m2/s

U ~1 cm/s

What is the order of magnitude of the Reynolds and Peclet number ? Flow field within the channels ?

Write the transport equation for O2

Boundary conditions on O2 concentration ?

ν02 ~10-6 m2/s

Re ~ 0.5 Pe ~ 500

Laminar Poiseuille Flow (parabolic velocity profile)

(4)

Model experiment

Channel length L = 70 mm Channel width W = 2 mm

Central channel height d 70 to 190 μm Top and bottom channels height 200 μm

U=(d2/12 η) Δp/L

Oxygen transfer rate

Channel height

Références

Télécharger maintenant ( PDF - 4 Page - 509.88 KB )

Documents relatifs

Is there an Intermediate Phrase in French?

In the last decade, a large body of evidence has shown that the placement of intonational boundaries in various languages is not exclusively dependent on syntactic constraints,

From Averaging to Acceleration, There is Only a Step-size

– We show in Section 2 that accelerated gradient descent, averaged gradient descent and the heavy-ball method for non-strongly-convex problems may be reformulated as constant

There is an alternative: Challenging the logic of neoliberal penality

Much of what is put forward by Loader and Sparks as public criminology is of signifi- cant value in terms of pointing the way towards alternatives to the current punitive penal

Neonatal tolerance to Mls-1a determinants: deletion or anergy of Vβ6 + T lymphocytes depending upon MHC compatibility of neonatally injected cells

In parallel to the findings described above, C57BL/6 or BALB/c mice (both Mls-1 ^ treated with H-2-incompatible Mls-1 a spleen cells from (C57BL/6 x DBA/2)F, mice showed practically

Is There an Earthquake Weather?

The purpose of this paper is to examine if there is likely a connection between the occurrence of earthquakes and the ionospheric signature of thunderstorm activity in the

Endogenous Business Cycles and Hysteresis. A Post-Keynesian, Agent-Based Approach

According to NAIRU proponents, this new equilibrium rate of unemployment solves the contradictions of the NRU as regards the term “natural” and its market clearing properties:

Metagenomics of the human intestinal tract: from who is there to what is done there

Starting from the current knowledge based on intestinal metagenomics, we point out on the role of food in shaping gut microbiota composition and functions, which is therefore

On diet and gut size in non-human primates and humans: is there a relationship to brain size?

Allometric relationship between the area of the absorptive mucosa of the digestive tract and functional body size in three distinct group of species, according to major