[Chakra]

Hello friends,
I am new in this forum,
I am trying to simulate the piston type wave maker for water tank. I have generated the code for the sinusoidal motion for the left wall of the tank. But while I interpret the code in ansys fluent I am getting some parse error in line 10. I Tried but failed. Please can you help me to resolve my issue.
Thanks in advance

#include<stdio.h>
#include“udf.h”
#define A 0.07
#define pi M_PI
#define LW 8
#define g 9.81
#define h 6
#define L0 40.0
#define L1 60.0
DEFINE_CG_MOTION(piston_moving, dt, cg_vel, cg_omega, time, dtime)
{
real u = 0;
real ww = 0;
real kk = 0;
real S = 0;
real cc = 0;
real T = 0;
kk = 2.0*pi/LW;
cc = sqrt(g*tanh(kk*h)/kk); /*wave velocity*/
ww = kk*cc; /*circle frequency*/
T = 2.0*pi/ww;
S = 0.5*A*(2*kk*h+sinh(2*kk*h))/pow(sinh(kk*h),2);
if(time <= T)
{
u = ww*S*time*cos(ww*time)/(2*T);
cg_vel[0] = u;
}
else
{
u = ww*S*cos(ww*time)/2;
cg_vel[0] = u;
}
}

[Debayan]

I'm also working on something similar. I wanted to know how you're adding the mass of the plunger and whether you're using overset meshing. Would be of great help if you could let me know.