syntax = "proto2";
package pb;

enum SolidType {
     Stainless = 0;
     Copper = 1;
}
enum GridType {
     Linear = 0;
     BlGrid = 1;
}
enum HeatTransferModel {
     Isentropic = 0;
     NoHeatTransfer = 1;     
     LaminarHeatTransfer = 2;
}
enum DragModel {
     Inviscid = 0;
     LaminarDrag = 1;
}
enum Cshape {
     Blapprox = 0;
     Circ = 1;
     VertPlates = 2;
}
message Geom {
}
enum SolidTemperatureModel {
     Prescribed = 0;
     HeatBalance = 1;
}

message Duct {
    required string name = 2;
    required double length = 3 [default = 1];
    optional uint32 ngp = 4 [default = 100];
    optional double dxb = 5 [default = 0.1];
    optional double dxmid = 6 [default = 0.01];
    required GridType gridtype = 8 [default = Linear];
    required string area = 9 [default="1+0*x/L"];
    required string phi = 10 [default = "1+0*x/L"];
    optional string rh = 11 [default = ""];
    required Cshape cshape = 12;
    required SolidType solidtype = 13;
    required HeatTransferModel htmodel = 14;
    required DragModel dragmodel = 15 [default = Inviscid];
    required string stempfunc = 16 [default = "293.15+x*x/L"];
    required SolidTemperatureModel stempmodel = 17 [default = Prescribed];

}