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Allow mutable contexts for evalexpr strings

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These may be slow when used as boundary conditions, but produces results
consistent with the special "vortex" type for the example.
This commit is contained in:
Magnus Ulimoen
2021-06-29 23:12:48 +02:00
parent ea90bb8655
commit 92ad7bc580
3 changed files with 51 additions and 13 deletions
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8
multigrid/examples/expressions_vortex.json
View File

@@ -18,10 +18,10 @@
"initial_conditions": {
"expressions": {
"globals": "uinf=1;vinf=0;beta=5;y0=0;x0=0;Tfactor=(GAMMA-1)*beta*beta/(8*GAMMA*PI*PI)",
"rho": "math::pow(1 - Tfactor*math::exp(1 - ((x-x0)*(x-x0) + (y-y0)*(y-y0))), 1.0/(GAMMA - 1))",
"u": "uinf + beta/(2*PI) * math::exp((1 - ((x-x0)*(x-x0) + (y-y0)*(y-y0)))/2)*(-(y-y0))",
"v": "vinf + beta/(2*PI) * math::exp((1 - ((x-x0)*(x-x0) + (y-y0)*(y-y0)))/2)*((x-x0))",
"globals": "uinf=1;vinf=1;beta=5;y00=0;x00=0;Tfactor=(GAMMA-1)*beta*beta/(8*GAMMA*PI*PI)",
"rho": "x0=x00+uinf*t;y0=y00+vinf*t; math::pow(1 - Tfactor*math::exp(1 - ((x-x0)*(x-x0) + (y-y0)*(y-y0))), 1.0/(GAMMA - 1))",
"u": "x0=x00+uinf*t;y0=y00+vinf*t; uinf + beta/(2*PI) * math::exp((1 - ((x-x0)*(x-x0) + (y-y0)*(y-y0)))/2)*(-(y-y0))",
"v": "x0=x00+uinf*t;y0=y00+vinf*t; vinf + beta/(2*PI) * math::exp((1 - ((x-x0)*(x-x0) + (y-y0)*(y-y0)))/2)*((x-x0))",
"p": "math::pow(rho, GAMMA)"
}
},

55
multigrid/src/eval.rs
View File

@@ -57,6 +57,7 @@ struct ContextWrapper<'a> {
v: Option<Value>,
rhou: Option<Value>,
rhov: Option<Value>,
id: std::collections::HashMap<String, Value>,
}
impl<'a> ContextWrapper<'a> {
@@ -71,6 +72,7 @@ impl<'a> ContextWrapper<'a> {
rhov: None,
u: None,
v: None,
id: std::collections::HashMap::new(),
}
}
}
@@ -86,7 +88,7 @@ impl Context for ContextWrapper<'_> {
"rhov" => self.rhov.as_ref(),
"u" => self.u.as_ref(),
"v" => self.v.as_ref(),
id => self.ctx.get_value(id),
id => self.id.get(id).or_else(|| self.ctx.get_value(id)),
}
}
@@ -95,6 +97,13 @@ impl Context for ContextWrapper<'_> {
}
}
impl ContextWithMutableVariables for ContextWrapper<'_> {
fn set_value(&mut self, identifier: String, value: Value) -> EvalexprResult<()> {
self.id.insert(identifier, value);
Ok(())
}
}
impl<D: Dimension> euler::eval::Evaluator<D> for EvaluatorConservation {
fn evaluate(
&self,
@@ -112,7 +121,7 @@ impl<D: Dimension> euler::eval::Evaluator<D> for EvaluatorConservation {
ctx.x = Some(x.into());
ctx.y = Some(y.into());
*rho = self.rho.eval_number_with_context(&ctx).unwrap();
*rho = self.rho.eval_number_with_context_mut(&mut ctx).unwrap();
});
azip!((&x in &x, &y in &y, &rho in &rho, rhou in &mut rhou) {
@@ -120,7 +129,7 @@ impl<D: Dimension> euler::eval::Evaluator<D> for EvaluatorConservation {
ctx.y = Some(y.into());
ctx.rho = Some(rho.into());
*rhou = self.rhou.eval_number_with_context(&ctx).unwrap();
*rhou = self.rhou.eval_number_with_context_mut(&mut ctx).unwrap();
});
azip!((&x in &x, &y in &y, &rho in &rho, rhov in &mut rhov) {
@@ -128,7 +137,7 @@ impl<D: Dimension> euler::eval::Evaluator<D> for EvaluatorConservation {
ctx.y = Some(y.into());
ctx.rho = Some(rho.into());
*rhov = self.rhov.eval_number_with_context(&ctx).unwrap();
*rhov = self.rhov.eval_number_with_context_mut(&mut ctx).unwrap();
});
azip!((&x in &x, &y in &y, &rho in &rho, &rhou in &rhou, &rhov in &rhov, e in &mut e) {
@@ -138,7 +147,7 @@ impl<D: Dimension> euler::eval::Evaluator<D> for EvaluatorConservation {
ctx.rhou = Some(rhou.into());
ctx.rhov = Some(rhov.into());
*e = self.e.eval_number_with_context(&ctx).unwrap();
*e = self.e.eval_number_with_context_mut(&mut ctx).unwrap();
});
}
}
@@ -157,7 +166,7 @@ impl<D: Dimension> euler::eval::EvaluatorPressure<D> for EvaluatorPressure {
ctx.x = Some(x.into());
ctx.y = Some(y.into());
*rho = self.rho.eval_number_with_context(&ctx).unwrap();
*rho = self.rho.eval_number_with_context_mut(&mut ctx).unwrap();
})
}
@@ -176,7 +185,7 @@ impl<D: Dimension> euler::eval::EvaluatorPressure<D> for EvaluatorPressure {
ctx.y = Some(y.into());
ctx.rho = Some(rho.into());
*u = self.u.eval_number_with_context(&ctx).unwrap();
*u = self.u.eval_number_with_context_mut(&mut ctx).unwrap();
})
}
fn v(
@@ -194,7 +203,7 @@ impl<D: Dimension> euler::eval::EvaluatorPressure<D> for EvaluatorPressure {
ctx.y = Some(y.into());
ctx.rho = Some(rho.into());
*v = self.v.eval_number_with_context(&ctx).unwrap();
*v = self.v.eval_number_with_context_mut(&mut ctx).unwrap();
})
}
@@ -217,7 +226,7 @@ impl<D: Dimension> euler::eval::EvaluatorPressure<D> for EvaluatorPressure {
ctx.u = Some(u.into());
ctx.v = Some(v.into());
*p = self.p.eval_number_with_context(&ctx).unwrap();
*p = self.p.eval_number_with_context_mut(&mut ctx).unwrap();
})
}
}
@@ -326,5 +335,33 @@ pub fn default_context() -> HashMapContext {
)
.unwrap();
context
.set_function(
"math::exp".into(),
Function::new(|arg| {
let arg = arg.as_number()?;
Ok(arg.exp().into())
}),
)
.unwrap();
context
.set_function(
"math::pow".into(),
Function::new(|arg| {
let arg = arg.as_tuple()?;
if arg.len() != 2 {
return Err(error::EvalexprError::WrongFunctionArgumentAmount {
expected: 2,
actual: arg.len(),
});
}
let s = arg[0].as_number()?;
let o = arg[1].as_number()?;
Ok(s.powf(o).into())
}),
)
.unwrap();
context
}

1
multigrid/src/main.rs
View File

@@ -342,6 +342,7 @@ fn main() {
let output = File::create(&opt.output, sys.grids.as_slice(), names).unwrap();
let mut output = OutputThread::new(output);
output.add_timestep(0, &sys.fnow);
let progressbar = progressbar(opt.no_progressbar, ntime);