Add scaling reference to readme

master
Dan Howe 6 years ago
parent 81763fe8fc
commit ef5cf514c0

@ -1,6 +1,6 @@
# scaling # scaling
Convert quantities between model and prototype scale using Froude and Reynoolds similitude. Convert quantities between model and prototype scale using Froude and Reynolds similitude.
## Installation ## Installation
@ -48,7 +48,7 @@ Dataframes are also accepted, and specific units can be specified for the values
```python ```python
>>> # Convert to prototype dimensions, with length scale=25 >>> # Convert to prototype dimensions, with length scale=25
df_proto = froude.model_to_proto( >>> df_proto = froude.model_to_proto(
df_model, df_model,
length_scale=25, length_scale=25,
input_unit='mm', input_unit='mm',
@ -56,8 +56,8 @@ df_proto = froude.model_to_proto(
index_input_unit='s', index_input_unit='s',
index_target_unit='s') index_target_unit='s')
df_proto.columns = ['$\eta$ (m)'] >>> df_proto.columns = ['$\eta$ (m)']
df_proto.plot() >>> df_proto.plot()
``` ```
![](doc/proto.png) ![](doc/proto.png)
@ -79,3 +79,30 @@ df_proto.plot()
>>> froude.dimensions('kilogram.metre/second^2') >>> froude.dimensions('kilogram.metre/second^2')
'L^1 M^1 T^-2' 'L^1 M^1 T^-2'
``` ```
## Froude scaling reference
| Quantity | Dimensions | Scaling exponent |
|--------------|---------------|------------------|
| Length | L^1 | λ^1 |
| Mass | M^1 | λ^3 |
| Time | T^1 | λ^0.5 |
| Velocity | L^1 T^-1 | λ^0.5 |
| Acceleration | L^1 T^-2 | λ^0 |
| Force | L^1 M^1 T^-2 | λ^3 |
| Pressure | L^-1 M^1 T^-2 | λ^1 |
| Overtopping | L^2 T^-1 | λ^1.5 |
## Reynolds scaling reference
| Quantity | Dimensions | Scaling exponent |
|--------------|---------------|------------------|
| Length | L^1 | λ^1 |
| Mass | M^1 | λ^3 |
| Time | T^1 | λ^2 |
| Velocity | L^1 T^-1 | λ^-1 |
| Acceleration | L^1 T^-2 | λ^-3 |
| Force | L^1 M^1 T^-2 | λ^0 |
| Pressure | L^-1 M^1 T^-2 | λ^-2 |
| Overtopping | L^2 T^-1 | λ^0 |

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