TELEMAC-MASCARET Forum: problem to set suspended sediment concentration (1/1)

Welcome, Guest

TOPIC: problem to set suspended sediment concentration

problem to set suspended sediment concentration 8 years 5 months ago #22024

Subhasri	I have coupled Telemac2d with Sisyphe. I have constant values of total suspended sediment in (g/lt) for two inlet boundaries.Please let me know the keywords in Sisyphe in which the values are asigned. KEYWORDS: 1. Concentration per class at boundaries: OR 2. Prescribed solid discharges: Thanking you in anticipation
	The administrator has disabled public write access.

problem to set suspended sediment concentration 8 years 5 months ago #22026

Pablo OFFLINE Moderator Posts: 316 Thank you received: 121	Dear Subhasri, you should use the keyword CONCENTRATION PER CLASS AT BOUNDARIES. Please be careful as the values must be expressed in volume concentration. Best wishes, Pablo
	The administrator has disabled public write access. The following user(s) said Thank You: Subhasri

problem to set suspended sediment concentration 8 years 5 months ago #22029

Subhasri	plz let me know that if I have the value of total suspended sediment concentration for one boundary is 16 g/lt, then what will be the volume of concentration?
	The administrator has disabled public write access.

problem to set suspended sediment concentration 8 years 5 months ago #22031

Subhasri

Am I right or not to convert the mass concentration into volume concentration:

Mass concentration = 10 g/lt
density of sediment = 2.65 g/cm3

volume concentration = mass concentration/density = 10/2.65 = 3.77 cm3/lt = .00377

Now I have to use this value (0.00377) at the keyword "concentration per class at the boundary" for the suitable inlet boundary.

I will proceed after getting confirmation of this convertion.

thanking you

The administrator has disabled public write access.

problem to set suspended sediment concentration 8 years 5 months ago #22033

Subhasri	If I tick the keyword "mass concentration", then I will use the mass concentration (16g/lt) for the keyword " concentration per class at boundary" and If I untick the keyword "mass concentration", then I will use the volume concentration (0.00377) for the keyword " concentration per class at boundary" plz reply me so that I can process at the earliest.
	The administrator has disabled public write access.

problem to set suspended sediment concentration 8 years 5 months ago #22034

mafknaapen OFFLINE Expert Boarder Posts: 157 Thank you received: 62	No, the boundary condition always requires volumetric concentrations. The keyword 'mass concentration' only changes the units o the output. 0.00377 is correct for 10 g/l.
	Dr Michiel Knaapen Senior Scientist E This email address is being protected from spambots. You need JavaScript enabled to view it. T +44 (0)1491 822399 HR Wallingford, Howbery Park, Wallingford, Oxfordshire OX10 8BA, United Kingdom T +44 (0)1491 835381, F +44 (0)1491 832233 www.hrwallingford.com The administrator has disabled public write access. The following user(s) said Thank You: Subhasri

problem to set suspended sediment concentration 8 years 5 months ago #22038

Subhasri	The value of volume of concentration is a dimensionless number. Plz let me know that the above conversion from mass concentration to volume concentration is right or not. thanking you
	The administrator has disabled public write access.