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conspire/constitutive/electrical/dielectric/linear/
mod.rs

1#[cfg(test)]
2mod test;
3
4use crate::{
5    constitutive::{ConstitutiveError, diffusion::Diffusion, electrical::Electrical},
6    math::{IDENTITY_00, Quantity, Tensor},
7    mechanics::{ElectricDisplacement, ElectricDisplacementTangent, ElectricField},
8    units::{Charge, EnergyDensity, Permittivity},
9};
10
11#[doc = include_str!("doc.md")]
12#[derive(Clone, Debug)]
13pub struct Linear {
14    /// The permittivity $`\varepsilon`$.
15    pub permittivity: Quantity<Permittivity>,
16}
17
18impl Electrical for Linear {}
19
20impl Diffusion for Linear {
21    type Balance = Charge;
22    #[doc = include_str!("potential.md")]
23    fn potential(
24        &self,
25        potential_gradient: &ElectricField,
26    ) -> Result<Quantity<EnergyDensity>, ConstitutiveError> {
27        Ok(potential_gradient.norm_squared() * self.permittivity * 0.5)
28    }
29    #[doc = include_str!("electric_displacement.md")]
30    fn flux(
31        &self,
32        potential_gradient: &ElectricField,
33    ) -> Result<ElectricDisplacement, ConstitutiveError> {
34        Ok(potential_gradient * -self.permittivity)
35    }
36    #[doc = include_str!("electric_displacement_tangent.md")]
37    fn tangent(
38        &self,
39        _potential_gradient: &ElectricField,
40    ) -> Result<ElectricDisplacementTangent, ConstitutiveError> {
41        Ok(IDENTITY_00 * -self.permittivity)
42    }
43}