Herschel |
Implements the Herschel-Bulkley model for the dependence of the viscosity on the shear rate.
Inheritance HierarchyNamespace: Altaxo.Calc.FitFunctions.Viscosity
Assembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3448.0 (4.8.3448.0)
SyntaxC#
public class HerschelBulkleyModel : IFitFunction, IFitFunctionWithDerivative, IImmutable, IEquatable<HerschelBulkleyModel>
The HerschelBulkleyModel type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | HerschelBulkleyModel | Initializes a new instance of the HerschelBulkleyModel class |
Properties| Name | Description | |
|---|---|---|
 | NumberOfDependentVariables | Number of dependent variables (i.e. y, in Altaxo this is commonly called v (like value)). |
| NumberOfIndependentVariables | Number of independent variables (i.e. x). |
| NumberOfParameters | Number of parameters of this fit function. |
Methods| Name | Description | |
|---|---|---|
 | Create | Creates a new instance of HerschelBulkleyModel. |
| DefaultParameterValue | Returns a default parameter value. You must ensure that the fit function would generate values with those default parameters. |
| DefaultVarianceScaling | Returns the default variance scaling for the dependent variable i. |
| DependentVariableName | Returns the ith dependent variable name. |
| Evaluate(Double, Double, Double) | This evaluates a function value. |
| Evaluate(Double, Double, Double, Double) | |
| Evaluate(IROMatrixDouble, IReadOnlyListDouble, IVectorDouble, IReadOnlyListBoolean) | Evaluates the function values at multiple x-points. |
| EvaluateDerivative | Evaluates the gradient of the function with respect to the parameters. |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object) |
| GetParameterBoundariesHardLimit | Gets the parameter boundaries that are really a hard limit, i.e. outside those limits, the function would probably evaluate NaN values, or makes no sense. |
| GetParameterBoundariesSoftLimit | Gets the intended parameter boundaries. This are soft limits, boundaries so that the intended purpose of the fit function is fullfilled. Example: in the exponential decay Exp(-a*t) a is intended to be positive. This is a soft limit, and not a hard limit, because a could be also negative, and the fit nevertheless would succeed. |
| GetType | Gets the Type of the current instance. (Inherited from Object) |
| IndependentVariableName | Returns the ith independent variable name. |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object) |
| ParameterName | Returns the ith parameter name. |
Events| Name | Description | |
|---|---|---|
 | Changed | Occurs when the fit function changed, including number or name of parameters, independent variables, dependent variables, or the scaling. |
RemarksRef [1]: Herschel, W.H.; Bulkley, R. (1926), "Konsistenzmessungen von Gummi-Benzollösungen", Kolloid Zeitschrift, 39 (4): 291–300, doi:10.1007/BF01432034, S2CID 97549389
See Also