Report Radiation Models used · Background Theory · Numerical Solution Approach and Boundary condition used · Participating media considerations · Non-Participating media (air) vs participating media...

I need to write 2000 words technical report. I have already outline the report requirement Problem is already solved using ANSYS software. Please do not count pictures and graph as pages. only count words


Report Radiation Models used · Background Theory · Numerical Solution Approach and Boundary condition used · Participating media considerations · Non-Participating media (air) vs participating media (Flue gases) Simulation Parameters · Radiation model specific parameters · Mesh refinement · Residual Refinement · Has your solution converged Why? Discussion on Results · Include and discuss plots generated in slides 7 and 8 · Provide explanation for why could the temperature and total surface heat fluxes be the same or different What trends did you expect? · Comments/suggestions for ANSYS Fluent software Summary and Suggestions · Which radiation model(s) can be used to most accurately simulate this problem? Why? See attached problem statement Background Theory: Each Model has 5 steps to solve the problem · Geometry · Meshing · Setup · Solution · Result 1st step Geometry First creating Geometry using Ansys design modeler Square Cube of 25 mm x 25 mm x 25 mm 2nd Step Meshing created mesh using meshing software · Mesh was generated with global mesh size of 0.001 m · There are 15,625 elements generated in mesh · Nodes: 17,576 nodes generated in mesh Assign Problem Parameter and Material Properties · Create zones 3rd Step Set up · Launch Fluent · Make sure you select double precision, display mesh after reading · Set the solver process to 4 · Start · Check and report quality · Set the y-gravitational acceleration= -9.81m/s2 · Assign Problem parameter – Material Properties · Set up the boundary Conditions · Wall-Low-X Aluminum wall · All other walls are insulated · See attached picture of BC · Select the which model you want to run · Set the convergence criteria · Here is the some of the Convergence Criteria · Continuity and species=1 thousand · X, Y, Z Velocity= .1 thousand · Energy, do-intensity 1 x 10-6m · As we all know that good convergence criteria means good results · Initialize for the hybrid initialization · Set the number of iterations to 500 to 1000 depend on which model you running · Calculate Residual Plots for Non-Participating media Air 1st Quadrant- S2S (enclosure Model) 2nd Quadrant –No Radiation (Flow and Convection Only) 3rd Quadrant P1 (Spherical Harmonics Model) 4th Quadrant – DO, DOM (Discrete Ordinate Model) No radiation Model only took 115 Iteration to converged S2S model took around 300 iteration to converged P1 model took around 460 iteration to converged and DOM model took around highest 560 iteration to converged Similarly Residual Plots for Participating media Flue Gases 1st Quadrant- S2S (enclosure Model) 2nd Quadrant –No Radiation (Flow and Convection Only) 3rd Quadrant P1 (Spherical Harmonics Model) 4th Quadrant – DO, DOM (Discrete Ordinate Model) No radiation Model only took 92 Iteration to converged S2S model took around 335 iteration to converged P1 model took around 465 iteration to converged and DOM model took around highest 570 iteration to converged Do Intensity makes square wave and converged Step 4 Solution · Set up/generate plots · Vertical centerline temperature(K) of the opposing cold wall T(y) at x=25 mm z=12.5mm · Gas centerline temperature(k) T(x) y=12.5 mm z=12.5mm · Vertical centerline total surface heat flux (W/m2) at the hot wall q(y) at x=0mm and z=12.5mm · Vertical centerline total surface heat flux (W/m2) at the opposing cold wall q(y) at x=25mm z=25 mm · Graph · This is Vertical Centerline Temperature of Opposing Cold Wall Graph for air · You can see an enormous difference in no radiation model compared to other radiation model. · In all radiation model temperature profile behave very close to each other · S2S and DOM model temperature profile is almost same · Even air and Flue gases for no radiation model has different profile · This is Vertical Centerline Temperature of Opposing Cold Wall Graph for Flue gases · This is Gas Centerline Temperature of Opposing Cold Wall Graph for air We can see even difference between air and flue gases even though they are non-participating media DO model is most accurate model Which is very close temperature profile with S2S model so DO model and S2S model is accurate This is Gas Centerline Temperature of Opposing Cold Wall Graph for flue gases This is Vertical Center Total Surface Heat Flux at the wall Graph for air No radiation model lowest heat flux. P1 is over predicting near the walls This is Vertical Center Total Surface Heat Flux at the wall Graph for flue gases No radiation model lowest heat flux. P1 is over predicting near the walls This is Vertical Center Total Surface Heat Flux at the opposing cold wall Graph for air All the model has Total surface heat flux is negative- all the radiation is leaving from cold wall It is getting infected and radiated off the medium that surrounding its box. This is Vertical Center Total Surface Heat Flux at the opposing cold wall Graph for Flue gases All the model has Total surface heat flux is negative- all the radiation is leaving from cold wall It is getting infected and radiated off the medium that surrounding its box. · Set up contour for visuals · Heat flux contours Summery: Air and Flue gases · Behaves differently when exposed to radiation due to the difference in their thermal properties · Non-Participating media (Air) -absorption and re-emittance is negligible mostly N2 and O2 · Participating media (Flue gas) -Water vapor and Co2 absorb and re-emit radiation DO model · DO model is most accurate for radiation interaction with gases · DO model is good for wide range of optical thickness · S2S model (enclosure model) · S2S model is good for optically thin problems · S2S model temp profile and heat flux profile very close to each other · S2S and Do model is accurate for at least this problem · Spherical Harmonic (P1) · Over predicts scattering of radiation · Little to no geometry dependence on incident radiation Vertical Centerline Temperature (K) of the Opposing Cold Wall-Air Air NR VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2486.87299999999999493.64800000000002508.08523.73699999999997539.68200000000002555.19299999999998569.76199999999994583.12400000000002595.18299999999999605.952615.49699999999996623.904631.24599999999998637.57100000000003642.88800000000003647.16650.29300000000001652.13099999999997652.48900000000003651.16399999999999647.91300000000001642.45000000000005634.49099999999999623.75900000000001610.03300000000002602.4Air S2S VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2971.71100000000001973.02099999999996973.57500000000005974.11900000000003974.51400000000001974.75900000000001975.07299999999998975.36900000000003975.58500000000004975.76800000000003975.88199999999995975.88199999999995975.91976.00099999999998976.00099999999998975.98500000000001975.89200000000005975.83500000000004975.77700000000004975.62300000000005975.35799999999995975.07899999999995974.79600000000005974.47799999999995974.47799999999995974.024Air P1VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2986.05399999999997986.05399999999997986.05499999999995986.05499999999995986.05600000000004986.05600000000004986.05700000000002986.05700000000002986.05799999999999986.05799999999999986.05899999999997986.05899999999997986.05899999999997986.05899999999997986.05899999999997986.05899999999997986.05899999999997986.05799999999999986.05799999999999986.05799999999999986.05700000000002986.05600000000004986.05600000000004986.05499999999995986.05399999999997986.05399999999997Air DO VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2971.47199999999998972.73299999999995973.03700000000003973.36599999999999973.77200000000005974.26700000000005974.83500000000004975.44500000000005976.05399999999997976.61400000000003977.07899999999995977.41099999999994977.58399999999995977.58399999999995977.41300000000001977.08299999999997976.62976.06299999999999975.45699999999999974.84900000000005974.28099999999995973.78499999999997973.37599999999998973.04399999999998972.73599999999999971.471 Temp (K) Vertical Centerline Temperature (k) Air NR VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2486.87299999999999493.64800000000002508.08523.73699999999997539.68200000000002555.19299999999998569.76199999999994583.12400000000002595.18299999999999605.952615.49699999999996623.904631.24599999999998637.57100000000003642.88800000000003647.16650.29300000000001652.13099999999997652.48900000000003651.16399999999999647.91300000000001642.45000000000005634.49099999999999623.75900000000001610.03300000000002602.4Air S2S VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2971.71100000000001973.02099999999996973.57500000000005974.11900000000003974.51400000000001974.75900000000001975.07299999999998975.36900000000003975.58500000000004975.76800000000003975.88199999999995975.88199999999995975.91976.00099999999998976.00099999999998975.98500000000001975.89200000000005975.83500000000004975.77700000000004975.62300000000005975.35799999999995975.07899999999995974.79600000000005974.47799999999995974.47799999999995974.024Air P1VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2986.05399999999997986.05399999999997986.05499999999995986.05499999999995986.05600000000004986.05600000000004986.05700000000002986.05700000000002986.05799999999999986.05799999999999986.05899999999997986.05899999999997986.05899999999997986.05899999999997986.05899999999997986.05899999999997986.05899999999997986.05799999999999986.05799999999999986.05799999999999986.05700000000002986.05600000000004986.05600000000004986.05499999999995986.05399999999997986.05399999999997Air DO VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2971.47199999999998972.73299999999995973.03700000000003973.36599999999999973.77200000000005974.26700000000005974.83500000000004975.44500000000005976.05399999999997976.61400000000003977.07899999999995977.41099999999994977.58399999999995977.58399999999995977.41300000000001977.08299999999997976.62976.06299999999999975.45699999999999974.84900000000005974.28099999999995973.78499999999997973.37599999999998973.04399999999998972.73599999999999971.471FG NR VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2564.67399999999998569.71400000000006580.47400000000005592.39700000000005605.05999999999995617.99400000000003630.73299999999995642.89099999999996654.17600000000004664.40700000000004673.49599999999998681.43100000000004688.23599999999999693.952698.60799999999995702.20899999999995704.726706.1706.23299999999995705.00400000000002702.28300000000002697.93899999999996691.85699999999997683.97900000000004674.32299999999998669.05700000000002FG S2S VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2972.11800000000005973.33799999999997973.90200000000004974.40700000000004974.80600000000004975.06600000000003975.35500000000002975.596975.87599999999998976.06799999999998976.15499999999997976.20899999999995976.20699999999999976.21199999999999976.20299999999997976.13976.01599999999996975.84400000000005975.63199999999995975.39400000000001975.12699999999995974.846974.476973.99800000000005973.37699999999995972.10599999999999FG P1VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2986.25099999999998986.25199999999995986.25300000000004986.25400000000002986.255986.25599999999997986.25699999999995986.25800000000004986.25900000000001986.25900000000001986.26986.26986.26986.26986.26986.26986.26986.25900000000001986.25900000000001986.25800000000004986.25699999999995986.25599999999997986.25400000000002986.25300000000004986.25199999999995986.25099999999998FG DO VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2971.86300000000006973.01099999999997973.35799999999995973.70500000000004974.11699999999996974.61975.16899999999998975.76499999999999976.35599999999999976.89800000000002977.34699999999998977.66700000000003977.83399999999995977.83399999999995977.66899999999998977.351976.90499999999997976.36699999999996975.77800000000002975.18399999999997974.62599999999998974.13300000000004973.71699999999998973.36599999999999973.01400000000001971.86199999999997 Temp (K) Vertical Centerline Temperature (K) of the Opposing Cold Wall-Flue Gases FG NR VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2564.67399999999998569.71400000000006580.47400000000005592.39700000000005605.05999999999995617.99400000000003630.73299999999995642.89099999999996654.17600000000004664.40700000000004673.49599999999998681.43100000000004688.23599999999999693.952698.60799999999995702.20899999999995704.726706.1706.23299999999995705.00400000000002702.28300000000002697.93899999999996691.85699999999997683.97900000000004674.32299999999998669.05700000000002FG S2S VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2972.11800000000005973.33799999999997973.90200000000004974.40700000000004974.80600000000004975.06600000000003975.35500000000002975.596975.87599999999998976.06799999999998976.15499999999997976.20899999999995976.20699999999999976.21199999999999976.20299999999997976.13976.01599999999996975.84400000000005975.63199999999995975.39400000000001975.12699999999995974.846974.476973.99800000000005973.37699999999995972.10599999999999FG P1VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2986.25099999999998986.25199999999995986.25300000000004986.25400000000002986.255986.25599999999997986.25699999999995986.25800000000004986.25900000000001986.25900000000001986.26986.26986.26986.26986.26986.26986.26986.25900000000001986.25900000000001986.25800000000004986.25699999999995986.25599999999997986.25400000000002986.25300000000004986.25199999999995986.25099999999998FG DO VCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-2971.86300000000006973.01099999999997973.35799999999995973.70500000000004974.11699999999996974.61975.16899999999998975.76499999999999976.35599999999999976.89800000000002977.34699999999998977.66700000000003977.83399999999995977.83399999999995977.66899999999998977.351976.90499999999997976.36699999999996975.77800000000002975.18399999999997974.62599999999998974.13300000000004973.71699999999998973.36599999999999973.01400000000001971.86199999999997 Temp (K) Gas Centerline Temperature(K) - Air Air NR GCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-21000908.11699999999996824.08100000000002758.85799999999995717.02599999999995694.75800000000004685.02499999999998681.93100000000004681.78099999999995682.74300000000005684.08900000000006685.62400000000002687.36099999999999689.36900000000003689.36900000000003691.69694.29499999999996697.03899999999999699.61500000000001701.51199999999994701.99800000000005700.14599999999996694.97699999999998685.71299999999997672.08654.47799999999995Air S2S GCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21.4E-21.4999999999999999E-21.6E-21.7000000000000001E-21.7999999999999999E-21.9E-20.022.1000000000000001E-22.1999999999999999E-22.3E-22.4E-22.5000000000000001E-21000997.61300000000006995.26400000000001992.99800000000005990.85599999999999988.87987.05899999999997985.428983.97199999999998982.678981.53099999999995980.51300000000003979.60900000000004978.80899999999997978.10199999999998977.48199999999997976.94600000000003976.49300000000005976.12199999999996975.83600000000001975.63599999999997975.52300000000002975.49699999999996975.55600000000004975.69799999999998975.90800000000002Air P1 GCL Temp01E-32E-33.0000000000000001E-34.0000000000000001E-35.0000000000000001E-36.0000000000000001E-37.0000000000000001E-38.0000000000000002E-38.9999999999999993E-30.011.0999999999999999E-21.2E-21.2999999999999999E-21