hi,

I am running a transit simulation. The temperature profile on a wall is a function of time. Say, we have 10 temperature profile ASCII files (format: x,y,z,T)for 10 time step points with same time interval. Now, we use 10 time steps and want to simulate each timestep with appropriate temperature profile from external file at that particular time. How to do it? I know how to do it when it is a steady state simulation (interpolation from file). But I hate to run 10 seperate simulations treating flow as quasi steady state. I want to do simulation with one transit run with CFX reading 10 files automatically for each timestep. I appreciate any help and an outline of procedure. Thanks a lot!

u can specify a interpolation with the time, but u have five variables (x,y,z,T,t).

the name of the function will be like that:

Temperaturesteven(t)

This will be your function as the boundary conditiion where you want to put it.

I made a 1d interpolation like "fluxrogerio(t)" (this was my boundary condition created by myself) USING EXPERIMENTAL DATA.

t[s] q" [W m^-2] 0.0000 -59.871370 0.2220 -57.282330 0.4440 -56.850820 0.6660 -58.576850 0.8880 -59.439860 1.1100 -59.439860 1.3320 -62.460410 1.5540 -62.891920 1.7760 -65.480970 1.9980 -65.912470 2.2200 -67.638500 2.4420 -72.385080 2.6640 -71.953580 2.8860 495.478700 3.1080 2687.104000 3.3300 4489.078000 3.5520 6102.055000 3.7740 7009.084000 3.9960 6729.465000 4.2180 7354.288000 4.4400 8421.838000 4.6620 9476.874000 4.8840 10427.050000 5.1060 11267.200000 5.3280 11999.460000 5.5500 12640.250000 5.7720 13203.800000 5.9940 13701.760000 6.2160 14135.860000 6.4380 14526.370000 6.6600 14875.030000 6.8820 15181.830000 7.1040 15451.960000 7.3260 15705.250000 7.5480 15933.950000 7.7700 16138.920000 7.9920 16328.780000 8.2140 16503.110000 8.4360 16661.040000 8.6580 16806.460000 8.8800 16941.090000 9.1020 17066.660000 9.3240 17182.730000 9.5460 17288.020000 9.7680 17386.400000 9.9900 17479.180000 10.2120 17566.340000 10.4340 17646.170000 10.6560 17720.390000 10.8780 17793.310000 11.1000 17858.470000 11.3220 17919.310000 11.5440 17978.430000 11.7660 18033.230000 11.9880 18081.560000 12.2100 18132.910000 12.4320 18179.510000 12.6540 18224.820000 12.8760 18262.360000 13.0980 18303.360000 13.3200 18343.050000 13.5420 18376.710000 13.7640 18413.820000 13.9860 18441.870000 14.2080 18470.350000 14.4300 18499.690000 14.6520 18529.460000 14.8740 18554.930000 15.0960 18579.950000 15.3180 18604.550000 15.5400 18627.420000 15.7620 18651.580000 15.9840 18674.020000 16.2060 18693.440000 16.4280 18711.560000 16.6500 18730.980000 16.8720 18746.950000 17.0940 18762.480000 17.3160 18778.010000 17.5380 18794.410000 17.7600 18806.930000 17.9820 18820.730000 18.2040 18830.660000 18.4260 18846.620000 18.6480 18859.570000 18.8700 18871.650000 19.0920 18883.300000 19.3140 18893.660000 19.5360 18905.310000 19.7580 18913.070000 19.9800 18924.730000 20.2020 18929.900000 20.4240 18940.260000 20.6460 18951.910000 20.8680 18957.090000 21.0900 18967.880000 21.3120 18976.940000 21.5340 18986.430000 21.7560 18994.630000 21.9780 19003.690000 22.2000 19012.320000 22.4220 19021.380000 22.6440 19026.560000 22.8660 19034.760000 23.0880 19040.800000 23.3100 19049.000000 23.5320 19056.770000 23.7540 19063.240000 23.9760 19071.440000 24.1980 19079.210000 24.4200 19085.680000 24.6420 19096.900000 24.8640 19106.820000 25.0860 19109.840000 25.3080 19116.750000 25.5300 19125.380000 25.7520 19133.140000 25.9740 19140.480000 26.1960 19148.250000 26.4180 19156.440000 26.6400 19165.940000 26.8620 19171.980000 27.0840 19179.310000 27.3060 19190.540000 27.5280 19195.280000 27.7500 19202.620000 27.9720 19210.820000 28.1940 19219.020000 28.4160 19232.820000 28.6380 19235.840000 28.8600 19241.450000 29.0820 19246.630000 29.3040 19256.120000 29.5260 19260.870000 29.7480 19268.640000 29.9700 19274.680000 30.1920 19282.440000 30.4140 19288.920000 30.6360 19294.100000

Depending on complexity of your profiles, you may define this with 'step' fuction.

step function, what a great idea! I just did it. Many thanks.