# VECFEM3 Reference Manual: vemu09

Type: FORTRAN routine

## NAME

vemu09 - evaluation of values U at centre points of elemenets

## SYNOPSIS

CALL VEMU03(
  LCU, CU, LU, U, LIVEM, IVEM, LNEK, NEK, LRPARM, RPARM, LIPARM, IPARM, LDNOD, DNOD, LRDPRM, RDPARM, LIDPRM, IDPARM, LNODN, NODNUM, LNOD, NOD, LNOPRM, NOPARM, LBIG, RBIG, IBIG)
INTEGER
  LCU, LU, LIVEM, LNEK, LRPARM, LIPARM, LDNOD, LRDPRM, LIDPRM, LNODN, LNOPRM, LBIG
INTEGER
  IVEM(LIVEM), NEK(LNEK), IPARM(LIPARM), DNOD(LDNOD), IDPARM(LIDPRM), NODNUM(LNODN), IBIG(*)
DOUBLE PRECISION
  CU(LCU), U(LU), RPARM(LRPARM), RDPARM(LRDPRM), NOD(LDNOD), NOPARM(LNOPRM), RBIG(LBIG)

## PURPOSE

vemu09 is a routine to evaluate the NU values U given at the geometrical nodes of the FEM mesh at the centre points of the elements.

## ARGUMENTS

LCU integer, scalar, input, local
  Length of vector CU, LCU>=NU*TOTNE, where TOTNE is the total number of elements on the process MYPROC.
CU double precision, array: CU(LCU), output, local
  The values of U at the center points of the elements. The NU values are stored separately for each individual group. CU(ADDCU(G)-1+CU1(G)*(j-1)+i) is the j-th value at the center point of the i-th element on the process MYPROC in group G. The numbers ADDCU and CU1 are returned in IVEM.
LU integer, scalar, input, local
  Length of input vector U, LU >=U1*NU.
U double precision, array: U(LU), input, local
  The input distribution at the geometrical nodes. U(U1*(j-1)+i) is the value of the j-th value at the i-th geometrical node on the process MYPROC. The values are not adjusted over the processes.
LIVEM integer, scalar, input, local
  Length of the integer information vector, LIVEM>= MESH+ NINFO.
IVEM integer, array: IVEM(LIVEM), input/output, local/global
  Integer information vector.
  (1)=MESH, input, local
    Start address of the mesh informations in IVEM, MESH>203+ NPROC.
  (2)=ERR, output, global
    Error number.

    0 | program terminated without error.
    90 | LBIG is too small.
    95 | IVEM, U or CU is too small.
    99 | fatal error.

  (5)=NIVEM, output, local
    Used length of IVEM.
  (30)=LOUT, input, local
    Unit number of the standard output file, normally 6.
  (31)=OUTCNT, input, local
    Output control flag.

    0 | only error messages are printed.
    >0 | in addition a protocol is printed.

  (36)=U1, input, global
    leading dimension of the U array, U1 >= NDEG
  (37)=NU, input, global
    Number of per geometrical node.
  (200)=NPROC, input, global
    Number of processes, see combgn.
  (201)=MYPROC, input, local
    Logical process id number, see combgn.
  (202)=NMSG, input/output, global
    Message counter. The difference of the input and the output values gives the number of communications during the vemu09 call.
  (204)=TIDS(1), input, global
    Begin of the list TIDS which defines the mapping of the logical process ids to the physical process ids. See combgn.
  (MESH), input, local
    Start of mesh informations, see mesh.
  (MESH+GINFO+GINFO1*(G-1)+17)=ADDCU, output, local
    Start address of the values for group G in CU.
  (MESH+GINFO+GINFO1*(G-1)+18)=CU1, output, local
    Leading dimension of the values for group G, normally CU1=NE.
LNEK integer, scalar, input, local
  Length of the element array.
NEK integer, array: NEK(LNEK), input, local
  Array of the elements, see mesh.
LRPARM integer, scalar, input, local
  Length of the real parameter array.
RPARM double precision, array: RPARM(LRPARM), input, local
  Real parameter array, see mesh.
LIPARM integer, scalar, input, local
  Length of the integer parameter array.
IPARM integer, array: IPARM(LIPARM), input, local
  Integer parameter array, see mesh.
LDNOD integer, scalar, input, local
  Length of the array of the Dirichlet nodes.
DNOD integer, array: DNOD(LDNOD), input, local
  Array of the Dirichlet nodes, see mesh.
LRDPRM integer, scalar, input, local
  Length of the real Dirichlet parameter array.
RDPARM double precision, array: RDPARM(LRDPRM), input, local
  Array of the real Dirichlet parameters, see mesh.
LIDPRM integer, scalar, input, local
  Length of the integer Dirichlet parameter array.
IDPARM integer, array: IDPARM(LIDPRM), input, local
  Array of the integer Dirichlet parameters, see mesh.
LNODN integer, scalar, input, local
  Length of the array of the id numbers of the geometrical nodes.
NODNUM integer, array: NODNUM(LNODN), input, local
  Array of the id numbers of the geometrical nodes, see mesh.
LNOD integer, scalar, input, local
  Length of the array of the coordinates of the geometrical nodes.
NOD double precision, array: NOD(LNOD), input, local
  Array of the coordinates of the geometrical nodes, see mesh.
LNOPRM integer, scalar, input, local
  Length of the array of the node parameters.
NOPARM double precision, array: NOPARM(LNOPRM), input, local
  Array of the node parameters, see mesh.
LBIG integer, scalar, input, local
  Length of the real work array. The needed length of LBIG depends on the given mesh. It should be as large as possible.
RBIG double precision, array: RBIG(LBIG), work array, local
  Real work array.
IBIG integer, array: IBIG(*), work array, local
  Integer work array, RBIG and IBIG have to be defined by the EQUIVALENCE statement.

## EXAMPLE

See vemexamples.

## REFERENCES

[FAQ], [DATAMAN], [DATAMAN2], [P_MPI].

## SEE ALSO

VECFEM, vemcompile, vemrun, vemhint, mesh, vemexamples, vemdis, userc, vemu04, vemu05, vemu06.

## COPYRIGHTS

Program by L. Grosz, C. Roll, P. Sternecker, 1989-1996. Copyrights by Universitaet Karlsruhe 1989-1996. Copyrights by Lutz Grosz 1996. All rights reserved. More details see VECFEM.

by L. Grosz, Auckland , 6. June, 2000.