Changes between Initial Version and Version 1 of Energy expenditure


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Timestamp:
Jul 28, 2010 12:18:12 PM (15 years ago)
Author:
cedric
Comment:

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  • Energy expenditure

    v1 v1  
     1work as Distance*Elevation makes sense 
     2 
     3Van Ginneken et al. (2008) estimate a cost of transport (COT)in kj.kg-1.km-1 do the amount of energy will be proportional to the distance covered by silver eel. The additional distance linked to altitude (water current) is relative to 
     4 Vitesse d'écoulement : 
     5 
     6      vitesse instantanée: u = dx/dt 
     7      vitesse moyenne : V 
     8Dans un chenal, relation empirique de Chezy: 
     9V= C (h S)1/2 
     10                                    C : coefficient de friction de Chezy 
     11                                    h : profondeur 
     12                                    S : pente 
     13As energy is 1/2mv² the energy is related to altitude. With potential energy mgh it also makes sense, but we should add them not multiply... 
     14