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kb:verticalgrid [2012/07/31 00:09] – enviadmin | kb:verticalgrid [2021/03/19 10:17] (current) – [Concepts of Vertical Grids] enviadmin | ||
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====== Vertical Grid Layout ====== | ====== Vertical Grid Layout ====== | ||
Different to the horizontal grid, the vertical gridding is not too obvious but still as important as the horizontal grid setup. | Different to the horizontal grid, the vertical gridding is not too obvious but still as important as the horizontal grid setup. | ||
- | In **2.5D | + | In **Concept Design models (2.5D)**, the vertical grid is generated on-the-fly based on the model settings such as building heights. You can change the settings for the vertical grid setup at any time. In **Full 3D models** the vertical grid is as fixed once you have created the model. The only way to change it is to convert the model down to a 2.5D model (and loose all the extra 3D information), |
===== Concepts of Vertical Grids ===== | ===== Concepts of Vertical Grids ===== | ||
For the 3D Main Model, ENVI-met allows two different types of vertical grids: an **Equidistant Grid (A)**, where all grids, except the lowest five, have an identical vertical extension Δz, and a **Telescoping Grid (B1,B2 and C)** where the grid size expands with the height. The figure below shows the differences the different types. | For the 3D Main Model, ENVI-met allows two different types of vertical grids: an **Equidistant Grid (A)**, where all grids, except the lowest five, have an identical vertical extension Δz, and a **Telescoping Grid (B1,B2 and C)** where the grid size expands with the height. The figure below shows the differences the different types. | ||
- | {{ :: | + | {{ :: |
- | <WRAP centeralign> | + | |
- | Different concepts for organizing the vertical grid layout | + | //<WRAP centeralign> |
</ | </ | ||
Remember that the resolution of your grid (horizontal as well as vertical) should match with the objects you have in your model. For example, it does not make sense to look at a very complicated building structure with overhanging building parts and small differences in building heights and then use a 5 m vertical grid. All of your fine structures will be reduced to a few single blocks! \\ | Remember that the resolution of your grid (horizontal as well as vertical) should match with the objects you have in your model. For example, it does not make sense to look at a very complicated building structure with overhanging building parts and small differences in building heights and then use a 5 m vertical grid. All of your fine structures will be reduced to a few single blocks! \\ | ||
- | **In Version 3.1 the handling of small objects as been modified a bit to avoid them from disappearing in a coarse grid mesh**. | ||
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- | \Delta z(k) = \left[ \left( 1 + \frac{s}{100} \right) \right]^{k-1} \cdot \Delta z_{start} | + | \Delta z(k) = \left[ \left( 1 |
$$ | $$ | ||