## THERMAL SCIENCE

International Scientific Journal

### COMPUTATIONAL FLUID DYNAMICS ANALYSIS ON HEAT TRANSFER AND FRICTION FACTOR CHARACTERISTICS OF A TURBULENT FLOW FOR INTERNALLY GROOVED TUBES

**ABSTRACT**

The article presents computational fluid dynamics studies on heat transfer, pressure drop, friction factor, Nusselt number and thermal hydraulic performance of a plain tube and tube equipped with the three types of internal grooves (circular, square and trapezoidal).Water was used as the working fluid. Tests were performed for Reynolds number ranges from 5000 to 13500 for plain tube and different geometry inside grooved tubes. The maximum increase of pressure drop was obtained from numerical modeling 74% for circular, 38% for square and 78% for trapezoidal grooved tubes were compared with plain tube. Based on computational fluid dynamics analysis the average Nusselt number was increased up to 37%, 26% and 42% for circular, square and trapezoidal grooved tubes respectively while compared with the plain tube. The thermal hydraulic performance was obtained from computational fluid dynamics analysis up to 38% for circular grooved tube, 27% for square grooved tube and 40% for trapezoidal grooved tube while compared with the plain tube.

**KEYWORDS**

PAPER SUBMITTED: 2011-04-04

PAPER REVISED: 2012-07-21

PAPER ACCEPTED: 2013-01-16

PUBLISHED ONLINE: 2013-04-13

**THERMAL SCIENCE** YEAR

**2013**, VOLUME

**17**, ISSUE

**Issue 4**, PAGES [1125 - 1137]

- Aubin,J., Fletcher, D.F., Xuereb,C., Modeling turbulent flow in stirred tanks with CFD: the influence of the modeling approach, turbulence model and numerical scheme, Int.J. Experimental Thermal and Fluid Science, 28 (2004), pp. 431-445.
- Masoud Rahimi, Sayed Reza Shabanian, Ammar Abdulaziz Alsairafi., Experimental and CFD studies on heat transfer and friction factor characteristics of a tube equipped with modified twisted tape insert, Int.J.chemical Engineering and Processing, 48 (2009), pp.762-770.
- Kadir bilen, Murat cetin, Hasan Gul, Tuba Balta., The investigation of groove geometry effect on heat transfer for internally grooved tubes, Int.J.Applied Thermal Engineering, 29 (2009), 753-761.
- Sharad Kumar, Saini,R.P., CFD based performance analysis of a solar air heater duct provided with artificial roughness, Int.J.Renewable Energy, 34 (2009),pp.1285-1291.
- Renqiang Xiong, Chung,J.N., A new model for three-dimensional random roughness effect on friction factor and heat transfer in micro tubes, Int.J. Heat and Mass Transfer, 53 (2010), pp. 3284-3291.
- Craft,T.J.,Lacovides,H., Mostafa,N.A., Modeling of three-dimensional jet array impingement and heat transfer on a concave surface, Int.J. Heat and Fluid Flow, 29 (2008), pp.687-702.
- Lacovides,H., Kelemenis,G., Raisee,M., Flow and heat transfer in straight cooling passages with inclined ribs on opposite walls: an experimental and computational study, Int.J. Experimental and Thermal Fluid Science, 27 (2003), pp.283-294.
- Alok Chaube, Sahoo,P.K., Solanki,S.C., Analysis of heat transfer augmentation and flow characteristics due to rib roughness over absorber plate of a solar air heater, Int.J.Renewable Energy , 31 (2006),pp.317-331.
- Irfan Karagoz, Fuat Kaya., CFD investigation of the flow and heat transfer characteristics in a tangential inlet cyclone, Int.J.Communications in Heat and Mass Transfer,34 (2007), pp.1119-1126.
- Rigby,G.D. Evans,G.M., CFD simulation of gas dispersion dynamics in liquid cross flows, Int.J. Applied Mathematical Modeling, 22 (1998), pp.799-810.
- Ling Li, Mo Yang, Yuwen Zhang., Numerical study of periodically fully-developed convection in channels with periodically grooved part, Int.J. Heat and Mass Transfer, 51(2008), pp.3057-3065.
- Eiamsa-ard,S., Wongcharee,K., Sripattanapipat., 3DNumerical Simulation of swirling flow and convective heat transfer in a circular tube induced by means of loose fit twisted tapes, Int. J. communications in heat mass transfer, 36 (2009), pp.947 - 955.
- Ventsislav Zimparov., Prediction of friction factors and heat transfer co-efficient for turbulent flow in corrugated tubes combined with twisted tape inserts, Part 1 friction factors, Int. J. Heat and Mass Transfer, 47(2004),pp.589 - 599.
- Ventsislav Zimparov., Prediction of friction factors and heat transfer co-efficient for turbulent flow in corrugated tubes combined with twisted tape inserts. Part.2.Heat Transfer Co-efficient, Int. J. of Heat and Mass Transfer, 47 (2004), pp.385 - 393.
- Goto,M., Inoue,N., Yonemoto,R., Ishiwatari,N. Condensation heat transfer of R410A inside internally grooved horizontal tubes, Int.J.Refrigeration 24 (2001),7, pp. 628 - 638.
- Goto,M., Inoue,N., Yonemoto,R., Condensation heat transfer of R410A inside internally grooved horizontal tubes, Int.J Refrigeration ,26 (2003), pp.410-416.
- Pongjet Promvonge., Thermal enhancement in a round tube with snail entry and coiled - wire inserts, Int. J. International communications in Heat and Mass Transfer, 35 (2008), 5,pp. 623 - 629.
- Pongjet Promvonge., Thermal augmentation in circular tube with twisted tape and wire coil turbulators, Int.J.Energy Conversion and Management, 49 (2008), pp.2949 - 2955.
- Yu-wei chiu, Jiin - Yuh Jang., 3D Numerical and Experimental Analysis for thermal - hydraulic characteristics of air flow inside a circular tube with different tube inserts, Int. J. Applied Thermal Engineering, 29 (2009), 250 - 258.
- Xiaoyan Zhang, Xingqun Zhang, Yunguang chen, Xiuling Yuan., Heat transfer characteristics for evaporation of R417A flowing inside horizontal smooth and internally grooved tubes, Int.J.Energy conversion and Management, 49 (2008), pp. 1731 - 1739.
- Xiao-Wei Li, Ji-an Meng, Zeng-yuan Guo., Turbulent flow and heat transfer in discrete double inclined ribs tube, Int.J. Heat and Mass Transfer, 52 (2009), pp. 962-970.
- Karwa, R.Solanki,S.C., Saini,J.S., Heat transfer coefficient and friction factor correlations for the transitional flow regime in rib roughened rectangular ducts, Int. J.Heat and Mass Transfer, 61(1999), 1,pp. 1597-1615.
- Karwa,R., Experimental studies of augmented heat transfer and friction in asymmetrically heated rectangular ducts with ribs on the heated wall in transverse, inclined, V-continuous and V-discrete pattern, Int.J. Communication in Heat and Mass Transfer, 30(2003), 2,pp. 241-250.
- Tanda,G., Heat transfer in rectangular channels with transverse and v-shaped broken ribs, Int.J.Heat and Mass Transfer, 4 (2004) , pp.229-243.
- Vicente, P.G., Garcia,A., Viedma,A., Experimental investigation on heat and frictional characteristics of spirally corrugated tubes in turbulent flow at different prandtl numbers, Int.J. Heat and Mass Transfer, 47(2004), 4, pp. 671-681.
- Garcia,A., Vicente,P.G., Viedma,A., Experimental study of heat transfer enhancement with wire coil inserts in laminar-transition-turbulent regimes at different prandtl numbers, Int.J.Heat Mass Transfer, 48 (2005), 21-22,pp. 4640-4651.
- Wang,L.,Sunden,B., Performance comparison of some tube inserts. Int.J. Communication in Heat and Mass Transfer, 29 (2002), 1, pp. 45-56.
- Zimparov,V., Enhancement of heat transfer by a combination of three start spirally corrugated tubes with a twisted tape. Int.J. Heat Transfer, 44(2001), 3, pp. 551-574.
- Fluent 6.3 ® April 7(2009).
- Kothandaraman,C.P., and Subramanyan,S., Heat and Mass Transfer data Book, New Age International Publishers, New Delhi, 2010.