Search found 4 matches

by artem_vb
Tue Jun 14, 2011 1:13 pm
Forum: ROMS Discussion
Topic: Nudging/clamping/radiation/gradient conditions for tracers
Replies: 5
Views: 3532

Re: Nudging/clamping/radiation/gradient conditions for trace

> What is it that you want to do? First, I would like to understand how the 'nudge' behaves, so I am able to make a knowledgeable choice -- why one would use it instead of clamping? As to the problem itself -- I am doing the simulation of the point source of contaminant (inside the domain) in the ...
by artem_vb
Sun Jun 12, 2011 9:47 am
Forum: ROMS Discussion
Topic: Nudging/clamping/radiation/gradient conditions for tracers
Replies: 5
Views: 3532

Re: Nudging/clamping/radiation/gradient conditions for trace

Clamping is nudging with an infinitesimally small timescale or nudging so hard it can't deviate from the suggested value Thank you, just to clarify this -- are following statements correct? 1) Nudging means that from time to time (within the time scale set by Tnudg parameter) boundary values are ...
by artem_vb
Wed Jun 08, 2011 11:00 am
Forum: ROMS Discussion
Topic: Nudging/clamping/radiation/gradient conditions for tracers
Replies: 5
Views: 3532

Nudging/clamping/radiation/gradient conditions for tracers

Hi, can somebody explain different open boundary conditions for tracers or point to corresponding documentation/forum thread? 1) What is the difference between "nudging" and "clamping"? 2) What is the difference between "gradient" and "radiation"? 3) Do tracer flags like EAST_TNUDGING cover ...
by artem_vb
Thu Nov 25, 2010 11:18 am
Forum: ROMS Problems
Topic: Uniformly negative concentration values
Replies: 0
Views: 1426

Uniformly negative concentration values

Hi, I am modelling the cohesive sediment and passive tracer spreading from the single-point source at the surface in the middle of the open sea (admittedly the one of the worst combinations). The problem is, that I have got uniformly negative values of the concentrations through the whole domain ...