[alws_cfd]

Can someone please help me to understand what is Grid-scale in the context of the following sentences taken from Boris et al. 1992:

1. It is only in the last several years, however, that a connection has been drawn between the grid-scale behavior of these algorithms and the need for and required properties of a subgrid-stress model to represent the unresolved “turbulent” scales.

2. ...highlighting the close interaction between the grid-scale errors in the underlying CFD algorithm and the subgrid turbulence model.

[FMDenaro]

Originally Posted by alws_cfd

Can someone please help me to understand what is Grid-scale in the context of the following sentences taken from Boris et al. 1992:

1. It is only in the last several years, however, that a connection has been drawn between the grid-scale behavior of these algorithms and the need for and required properties of a subgrid-stress model to represent the unresolved “turbulent” scales.

2. ...highlighting the close interaction between the grid-scale errors in the underlying CFD algorithm and the subgrid turbulence model.

If I understand the reference, the context of these sentences is about the MILES formulation proposed by Boris. That is about the role of local truncation error as well as that of the FCT scheme is acting as an implicit SGS model at the grid size level.

[alws_cfd]

Hello FMDenaro,

Thank you for the answer.

Yes, these are indeed in the context of MILES. If I correctly understood your answer, in this paper Grid-scale is nothing but the size of the grid, say h along the x direction.

Is my understanding correct?

[FMDenaro]

Originally Posted by alws_cfd

Hello FMDenaro,

Thank you for the answer.

Yes, these are indeed in the context of MILES. If I correctly understood your answer, in this paper Grid-scale is nothing but the size of the grid, say h along the x direction.

Is my understanding correct?

Yes, that sentence should imply the “computational” grid-size