.oldTime() question

chaolian · November 6, 2012, 20:02

Info<< "Reading field alphaL\n" << endl;
volScalarField alphaL
(
IOobject
(
"alphaL",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
alphaL.oldTime();
mesh,
dimensionedScalar("alphaL", dimless, scalar(0.0))
);
--------------------------
When compiled, error:
createFields.H:42: error: expected `)' before ';' token
createFields.H:44: warning: left-hand operand of comma has no effect
createFields.H:45: error: expected `;' before ')' token
--------------------------
I cannot figure out where the problem is. Thanks.

kathrin_kissling · November 7, 2012, 02:36

Hey,

first thing is a general one:

you should not use a ; (semicolon) inside a constructor. These are comma-seperated lists.

second: Check GeometricField class for constructors, I think there is none like the one you stated. What are you trying to do?

Best

Kathrin

chaolian · November 7, 2012, 06:51

Hi, Kathrin
Thanks for pointing out this mistake.
----------------
volScalarField alphaTemp
(
IOobject
(
"alphaTemp",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::AUTO_WRITE
),
mesh,
dimensionedScalar("alphaTemp", dimless, 0)
);
alphaTemp.oldTime();
-------------------
Maybe this is the correct way to use. I am trying to store alphaTemp's old value for each time, since I want to use ddt(alphaTemp) later. I am not quite sure whether this is correct.

chaolian · November 7, 2012, 06:53

Hi, Kathrin
Thanks for pointing out this mistake.
----------------
volScalarField alphaTemp
(
IOobject
(
"alphaTemp",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::AUTO_WRITE
),
mesh,
dimensionedScalar("alphaTemp", dimless, 0)
);
alphaTemp.oldTime();
-------------------
Maybe this is the correct way to use. I am trying to store alphaTemp's old value for each time, since I want to use ddt(alphaTemp) later. I am not quite sure whether this is correct.

November 6, 2012, 20:02	.oldTime() question	#1
chaolian New Member Chad Join Date: Sep 2011 Posts: 16 Rep Power: 14	Info<< "Reading field alphaL\n" << endl; volScalarField alphaL ( IOobject ( "alphaL", runTime.timeName(), mesh, IOobject::NO_READ, IOobject::NO_WRITE ), alphaL.oldTime(); mesh, dimensionedScalar("alphaL", dimless, scalar(0.0)) ); -------------------------- When compiled, error: createFields.H:42: error: expected `)' before ';' token createFields.H:44: warning: left-hand operand of comma has no effect createFields.H:45: error: expected `;' before ')' token -------------------------- I cannot figure out where the problem is. Thanks.

November 7, 2012, 02:36		#2
kathrin_kissling Senior Member Kathrin Kissling Join Date: Mar 2009 Location: Besigheim, Germany Posts: 134 Rep Power: 17	Hey, first thing is a general one: you should not use a ; (semicolon) inside a constructor. These are comma-seperated lists. second: Check GeometricField class for constructors, I think there is none like the one you stated. What are you trying to do? Best Kathrin Action.Kamen likes this.

November 7, 2012, 06:51		#3
chaolian New Member Chad Join Date: Sep 2011 Posts: 16 Rep Power: 14	Hi, Kathrin Thanks for pointing out this mistake. ---------------- volScalarField alphaTemp ( IOobject ( "alphaTemp", runTime.timeName(), mesh, IOobject::NO_READ, IOobject::AUTO_WRITE ), mesh, dimensionedScalar("alphaTemp", dimless, 0) ); alphaTemp.oldTime(); ------------------- Maybe this is the correct way to use. I am trying to store alphaTemp's old value for each time, since I want to use ddt(alphaTemp) later. I am not quite sure whether this is correct. Kummi likes this.

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November 7, 2012, 06:53		#4
chaolian New Member Chad Join Date: Sep 2011 Posts: 16 Rep Power: 14	Hi, Kathrin Thanks for pointing out this mistake. ---------------- volScalarField alphaTemp ( IOobject ( "alphaTemp", runTime.timeName(), mesh, IOobject::NO_READ, IOobject::AUTO_WRITE ), mesh, dimensionedScalar("alphaTemp", dimless, 0) ); alphaTemp.oldTime(); ------------------- Maybe this is the correct way to use. I am trying to store alphaTemp's old value for each time, since I want to use ddt(alphaTemp) later. I am not quite sure whether this is correct.