rhs_group_end

Module Contents

Classes

RHSEND

Compute various geometric properties for VLM analysis.

Functions

generate_simple_mesh(nx, ny[, n_wake_pts_chord])

class rhs_group_end.RHSEND(**kwargs)

Bases: csdl.Model

Compute various geometric properties for VLM analysis. These are used primarily to help compute postprocessing quantities, such as wave CD, viscous CD, etc. Some of the quantities, like normals, are used to compute the RHS of the AIC linear system. A gamma_b + b + M gamma_w = 0 parameters ———- Returns ——- rhs[num_nodes, system_size] : csdl array M[num_nodes, system_size, system_size] : csdl array

define()

User defined method to define runtime behavior. Note: the user never _calls_ this method. Only the Simulator class constructor calls this method.

Example

```py class Example(Model):

def define(self):

self.create_input(‘x’) m = 5 b = 3 y = m*x + b self.register_output(‘y’, y)

# compile using Simulator imported from back end… sim = Simulator(Example()) sim[‘x’] = -3/5 sim.run() print(sim[‘y’]) # expect 0 ```

initialize()

User defined method to declare parameter values. Parameters are compile time constants (neither inputs nor outputs to the model) and cannot be updated at runtime. Parameters are intended to make a Model subclass definition generic, and therefore reusable. The example below shows how a Model subclass definition uses parameters and how the user can set parameters when constructing the example Model subclass.

Example

```py class Example(Model):

def initialize(self):

self.parameters.declare(‘num_times’, types=int) self.parameters.declare(‘step_size’, types=float) self.parameters.declare(‘surface’, types=dict)

def define(self):

num_times = self.parameters[‘num_times’] step_size = self.parameters[‘step_size’] surface = self.parameters[‘surface’] name = surface[‘name’] # str symmetry = surface[‘symmetry’] # bool mesh = surface[‘mesh’] # numpy array

# define runtime behavior…

surface = {

‘name’: ‘wing’, ‘symmetry’: False, ‘mesh’: mesh,

}

# compile using Simulator imported from back end… sim = Simulator(

Example(

num_times=100, step_size=0.1, surface=surface,

),

)

```

rhs_group_end.generate_simple_mesh(nx, ny, n_wake_pts_chord=None)