BuildSysPro.IBPSA.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_m_flow_DerivativeCheck2

# .BuildSysPro.IBPSA.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_m_flow_DerivativeCheck2

Model that checks the correct implementation of the 2nd order derivative of the flow function

## Information

This model validates the implementation of IBPSA.Fluid.BaseClasses.FlowModels.basicFlowFunction_m_flow and its second order derivative IBPSA.Fluid.BaseClasses.FlowModels.basicFlowFunction_m_flow_der2. If the derivative implementation is wrong, the simulation will stop with an error.

#### Implementation

The mass flow rate `m_flow` is increased non-linearly in order for the first and second derivatives in IBPSA.Fluid.BaseClasses.FlowModels.basicFlowFunction_m_flow_der2 to be non-zero during part of the simulation. This will ensure full code coverage of this function.

## Revisions

- July 29, 2015, by Michael Wetter:
  First implementation.

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