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Search: Posts Made By: FMDenaro
Forum: Main CFD Forum November 16, 2012, 14:10
Replies: 19
Views: 17,197
Posted By FMDenaro
in laminar flows is a physical condition in...

in laminar flows is a physical condition in deterministic sense, unlike in turbulence where is a statistically steady state. In the latter case, you need of an energy equilibrium as well, otherwise...
Forum: Main CFD Forum November 16, 2012, 05:09
Replies: 19
Views: 17,197
Posted By FMDenaro
I am not sure to understand the real sense of...

I am not sure to understand the real sense of this topic...
In nature, steady laminar flows are quite rare ... in the most part of cases, the natural state of the flow motion is unsteady and...
Forum: Main CFD Forum November 10, 2012, 18:48
Replies: 19
Views: 17,197
Posted By FMDenaro
1. No, my idea is that URANS have a model which...

1. No, my idea is that URANS have a model which acts also on resolved part of the unsteadiness. Hence, on laminar flows LES is able to reduce to a DNS, URANS no.

2. Yes, zero order statistics...
Forum: Main CFD Forum November 10, 2012, 05:20
Replies: 19
Views: 17,197
Posted By FMDenaro
From a pratical (and rigorous) point of view, you...

From a pratical (and rigorous) point of view, you can run only the RANS formulation in a steady state solution as you look for a statistic solution. No other formulations (URANS/LES/DNS) can be run...
Forum: Main CFD Forum November 2, 2012, 17:38
Replies: 19
Views: 17,197
Posted By FMDenaro
Steady simulations can be performed also for...

Steady simulations can be performed also for turbulent flow that are in energetic equilibrium. This is however a statistical meaning of the steady state, and is usually associated with RANS...
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