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Journal articles on the topic 'Extended surface'

To see the other types of publications on this topic, follow the link: Extended surface.

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Kraus, A. D. "Analysis of Extended Surface." Journal of Heat Transfer 110, no. 4b (November 1, 1988): 1071–81. http://dx.doi.org/10.1115/1.3250611.

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Previous work, by the author and others, pertaining to parameterizations for individual fins is reviewed. These parameterizations are the thermal transmission matrices and ratios that were devised to facilitate the analysis of an assembly of individual fins into an array of extended surface. An elaboration of the usefulness of these parameters, particularly with regard to their superiority over the notion of fin efficiency or fin effectiveness, is made. The concept of reciprocity is developed and the representation of an individual fin as a connection of just three simple resistances is developed. A procedure for the nodal analysis of finned arrays is developed via a matrix-oriented approach.

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2

Lutwak, Erwin. "Extended affine surface area." Advances in Mathematics 85, no. 1 (January 1991): 39–68. http://dx.doi.org/10.1016/0001-8708(91)90049-d.

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3

Kraus,, AD, A. Aziz,, J. Welty,, and DP Sekulic,. "Extended Surface Heat Transfer." Applied Mechanics Reviews 54, no. 5 (September 1, 2001): B92. http://dx.doi.org/10.1115/1.1399680.

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4

Xu, Jia Chuan, Ping Ping Fan, Zeng Xiang Song, and Wei Cheng Zheng. "Surface Extension in Smoothing of Class a Surfaces for Auto-Body." Advanced Materials Research 690-693 (May 2013): 2767–71. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.2767.

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In smoothing of Class A surfaces for auto-body, the whole surface is firstly divided into many base surfaces, and then blended them into a whole surface. The base surface is often not big enough to meet the blending requirements, so it should be extended. The paper discussed the extension of Bézier curves and surfaces, and analyzed the relationships between extended curves/surfaces and vertexes. The result shows that the arrangement of control vertexes is closely related to the quality of extended curves/surfaces.

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5

Hashiguchi, Koichi. "Extended Rate-Dependent Subloading Surface Model." Key Engineering Materials 233-236 (January 2003): 205–10. http://dx.doi.org/10.4028/www.scientific.net/kem.233-236.205.

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6

Tropper, A. C., and S. Hoogland. "Extended cavity surface-emitting semiconductor lasers." Progress in Quantum Electronics 30, no. 1 (January 2006): 1–43. http://dx.doi.org/10.1016/j.pquantelec.2005.10.002.

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7

Ghatee, M. H., A. Maleki, and H. Ghaed-Sharaf. "Extended Generic Nature of Surface Entropy." Langmuir 19, no. 2 (January 2003): 211–13. http://dx.doi.org/10.1021/la026675s.

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8

Szabelski, Pawel. "Extended Surface Chirality for Enantiospecific Adsorption." Chemistry - A European Journal 14, no. 27 (September 19, 2008): 8312–21. http://dx.doi.org/10.1002/chem.200800444.

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9

Wu, Weidong, and Xunnian Yang. "Variational surface design under normal field guidance." Journal of Computational Design and Engineering 2, no. 3 (March 9, 2015): 129–36. http://dx.doi.org/10.1016/j.jcde.2015.03.001.

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Abstract This paper proposes a novel method for shape design of a Bézier surface with given boundary curves. The surface is defined as the minimizer of an extended membrane functional or an extended thin plate functional under the guidance of a specified normal field together with an initial prescribed surface. For given boundary curves and the guiding normal field, the free coefficients of a Bézier surface are obtained by solving a linear system. Unlike previous PDE based surface modeling techniques which construct surfaces just from boundaries, our proposed method can be used to generate smooth and fair surfaces that even follow a specified normal field. Several interesting examples are given to demonstrate the applications of the proposed method in geometric modeling. Highlights Two extended energy functionals are proposed for variational surface modeling. The guiding normal field can be used to control the shapes of the variational surfaces efficiently. The proposed technique can be used for various modeling purposes like editing, hole filling or transition surface design.

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10

Lee, I., E. Chung, H. Kweon, S. Yiacoumi, DC Joy, A. Palumbo, and C. Tsouris. "Scanning Surface Potential Microscopy of Spores on Planar Surfaces." Microscopy and Microanalysis 15, S2 (July 2009): 1132–33. http://dx.doi.org/10.1017/s143192760909254x.

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11

Shih, A., C. Hor, D. Mueller, C. R. K. Marrian, W. T. Elam, P. Wolf, J. P. Kirkland, and R. A. Neiser. "Surface extended x‐ray absorption fine structure study of surface BaO layers on tungsten surfaces." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 6, no. 3 (May 1988): 1058–62. http://dx.doi.org/10.1116/1.575635.

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12

Zheng, Zuo Yong, and Bin Yang. "Surface Shape Measurement Using Extended Photometric Stereo." Advanced Materials Research 301-303 (July 2011): 908–12. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.908.

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Photometric stereo is a widely-used non-contact optical technology for surface shape measurement in industry. However, it is subject two limitations: (1) all light directions used should be known; (2) reflection on the surface to be measured should obey the Lambertian model. In this paper, an extended photometric stereo is proposed to overcome these limitations. Firstly, initial light directions are estimated in terms of normals of those points on the silhouette; secondly, an iterative process is established to refine alternately both the normals and all light directions, with specular pixels removed; at last, the final surface shape is worked out by integrating the normals. Experimental results show the considerable feasibility of this algorithm.

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13

Stark, Ronald, and Klaus Reif. "Surface Brightness Measurements of Extended Galactic Nebulae." Publications of the Astronomical Society of Australia 15, no. 1 (1998): 86–90. http://dx.doi.org/10.1071/as98086.

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AbstractWe discuss the importance of digitised sky-limited Schmidt B- and R-band, and Hα images of extended translucent (AB ≃ 1–5 mag) and dark (AB > 5 mag) clouds. In translucent clouds (e.g. high-latitude cirrus) photons can penetrate through the whole cloud and control the physical and chemical processes. Comparison of the B images with far-infrared/submillimetre CO, CI, and CII emission provides important information on the non-homogeneous cloud structure, carbon chemistry and energy balance. In dark clouds the interior is completely shielded from the interstellar radiation field. L1204 is a dark cloud with at its edge the well-known HII rim S140. The R-band image shows S140 as well as the diffuse extended HII region around the exciting B-type star. However, the sensitivity for Hα in the R-band is rather low and there is contamination with diffusely scattered red light from dust. Deep Hα and R-band imaging of an ∼20′×20′ field has recently been done with the 1 m Hoher List telescope of Bonn University. A wealth of small-scale structures can been seen on continuum-subtracted images which provide new insight on the geometry of this cloud.

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14

Kundagrami, Arindam, Chandan Dasgupta, P. Punyindu, and S. Das Sarma. "Extended self-similarity in kinetic surface roughening." Physical Review E 57, no. 4 (April 1, 1998): R3703—R3706. http://dx.doi.org/10.1103/physreve.57.r3703.

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15

Park, Sunkyung, Wonseok Kang, Jeong-Eun Lee, and Sang-Gak Lee. "WILSON-BAPPU EFFECT: EXTENDED TO SURFACE GRAVITY." Astronomical Journal 146, no. 4 (August 21, 2013): 73. http://dx.doi.org/10.1088/0004-6256/146/4/73.

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16

Kraus, A. D., and A. D. Snider. "Choking and Optimization of Extended Surface Arrays." Journal of Heat Transfer 107, no. 4 (November 1, 1985): 746–49. http://dx.doi.org/10.1115/1.3247499.

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When individual extended surface components such as fins or spines are assembled into an array, the performance of the array may become limited by the performance of the fin closest to the base of the array. This paper draws upon previous work of the authors and provides guidance for the selection of the width or diameter of the innermost fin or spine.

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17

Ishii, Akira, and Iku Nakamura. "Extended McKay correspondence for quotient surface singularities." Quarterly Journal of Mathematics 70, no. 2 (October 4, 2018): 395–408. http://dx.doi.org/10.1093/qmath/hay047.

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Abstract Let G be a finite subgroup of GL(2) acting on A2/{0} freely. The G-orbit Hilbert scheme G-Hilb(A2) is a minimal resolution of the quotient A2/G as given by A. Ishii, On the McKay correspondence for a finite small subgroup of GL(2,C), J. Reine Angew. Math. 549 (2002), 221–233. We determine the generator sheaf of the ideal defining the universal G-cluster over G-Hilb(A2), which somewhat strengthens a version [10] of the well-known McKay correspondence for a finite subgroup of SL(2).

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18

Kraus, A. D. "Heat flow through extended surface heat exchangers." International Journal of Heat and Fluid Flow 6, no. 1 (March 1985): 22. http://dx.doi.org/10.1016/0142-727x(85)90027-x.

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19

Kolar, Ajit K., and V. M. K. Sastri. "Extended surface heat transfer in fluidized beds." Chemical Engineering and Processing: Process Intensification 22, no. 1 (July 1987): 1–17. http://dx.doi.org/10.1016/0255-2701(87)80024-7.

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20

Massel, Stanislaw R. "Extended refraction-diffraction equation for surface waves." Coastal Engineering 19, no. 1-2 (February 1993): 97–126. http://dx.doi.org/10.1016/0378-3839(93)90020-9.

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21

Lane, H. J., and P. J. Heggs. "Extended surface heat transfer—the dovetail fin." Applied Thermal Engineering 25, no. 16 (November 2005): 2555–65. http://dx.doi.org/10.1016/j.applthermaleng.2004.11.031.

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22

Jeong, Ji Wung, Ho Suk Yeon, and Kang-Bak Park. "Extended Nonsingular Terminal Sliding Surface for Second-Order Nonlinear Systems." Abstract and Applied Analysis 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/267510.

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An extended nonsingular terminal sliding surface is proposed for second-order nonlinear systems. It is shown that the proposed surface is a superset of a conventional nonsingular terminal sliding surface which guarantees that the system state gets to zero in finite time. The conventional nonsingular sliding surfaces have been designed using a power function whose exponent is a rational number with positive odd numerator and denominator. The proposed nonsingular terminal sliding surface overcomes the restriction on the exponent of a power function; that is, the exponent can be a positive real number. Simulation results are provided to show the validity of the main result.

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23

Liu, Fan, Xiaomin Ji, and Jing Gao. "Extended SQ-Coons Surface and Its Application on Fairing Automobile Surface Design." Mathematical Problems in Engineering 2020 (October 29, 2020): 1–25. http://dx.doi.org/10.1155/2020/4912978.

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Aiming at car design, a parametric design method is proposed in this paper. There are two contents in this method, a novel parametric surface, a shape-adjustable automobile styling template, and a design method of integrating the two contents. The surface termed extended SQ-Coons surface constructed in this paper has the advantage of being fine adjusted while always interpolating at the given boundary curves, which is suitable for its application in automobile modeling design. Matching with the surface, a car model template built by multiple quadrilateral surfaces is proposed. The car models built by the template could achieve the parametric adjustability of all modeling features on the premise of maintaining G 1 continuity between subsurfaces. Finally, after the integration of the surface and the template, a whole set of parametric automobile surface modeling design method is proposed. In this method, the overall shape of the car body is determined through multi angle hand drawing, and curve control points, segmentation parameters, and shape parameters are used to adjust the detail modeling. The final results show that the novel surface and template proposed could be used to parametrically establish the vehicle models of various shapes and improve the design efficiency in the conceptual design stage.

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24

Watson, Philip R. "Critical Compilation of Surface Structures Determined by Surface Extended X‐Ray Absorption Fine Structure (SEXAFS) and Surface Extended Electron Energy Loss Spectroscopy (SEELFS)." Journal of Physical and Chemical Reference Data 21, no. 1 (January 1992): 123–56. http://dx.doi.org/10.1063/1.555912.

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25

Kelly, T. F., D. P. Olson, D. Reinhard, I. Martin, D. Lawrence, T. J. Prosa, and D. J. Larson. "Atom Probe Tomography for Surface and Near-Surface Applications." Microscopy and Microanalysis 18, S2 (July 2012): 910–11. http://dx.doi.org/10.1017/s143192761200640x.

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26

Li, Jonathan, Guofeng Wang, and Guangwen Zhou. "Surface segregation phenomena in extended and nanoparticle surfaces of Cu–Au alloys." Surface Science 649 (July 2016): 39–45. http://dx.doi.org/10.1016/j.susc.2016.01.013.

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27

Yu, Tian Tang, and Lu Yang Shi. "On XFEM Applications to Crack Surface under External Force." Applied Mechanics and Materials 152-154 (January 2012): 210–15. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.210.

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The extended finite element method is applied to modeling growth of arbitrary crack with crack surface tractions. Firstly, the extended finite element method is investigated for the stress intensity factor solution of surface traction problems. Secondly, for different water pressure acting on the crack surfaces and different crack length, the variation of the stress intensity factors is investigated. Finally, the process of hydraulic fracturing is simulated with the method. Numerical simulations illustrate that the method can effectively model the fracture problems with surface tractions.

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28

Khumran, A. M., N. Yimer, Y. Rosnina, H. Wahid, M. O. Ariff, H. Homayoun, K. Asmatullah, and T. K. Bello. "Butylated hydroxytoluene protects bull sperm surface protein-P25b in different extenders following cryopreservation." April-2020 13, no. 4 (2020): 649–54. http://dx.doi.org/10.14202/vetworld.2020.649-654.

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Aim: The aim of this study was to investigate the effects of different concentration of butylated hydroxytoluene (BHT) on sperm membrane surface protein "P25b" from cryopreserved bull semen in either lecithin based Bioxcell® (BX) or two egg-yolk based extenders, tris-egg yolk (TEY), and citrate-egg yolk (CEY). Materials and Methods: Forty-five semen samples, 15 each were extended with either BX, TEY, or CEY extender which contained different concentrations (0.0 - control, 0.5, 1.0, 1.5, 2.0, and 3.0 mM/mL) of BHT. The extended semen samples were frozen at a concentration of 20×106/mL in 0.25 mL straws and stored in liquid nitrogen for 2 weeks. The frozen samples were thereafter thawed, proteins extracted and analyzed for quantities of protein P25b through direct sodium dodecyl sulfate-polyacrylamide gel electrophoresis gel densitometry. Peptides were confirmed by Western blotting (WB). Results: Results showed that supplementation of BHT improved (p<0.05) quantity of protein P25b at concentrations of 0.5 mM/mL for BX and at 1.0 mM/mL for TEY and CE when compared with the controls and other treatments. Conclusion: BHT supplementation at 0.5 in BX and 1.0 mM/mL in TEY and CEY has protected bull sperm fertility marker protein P25b in frozen-thawed bull sperm.

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29

Schaffer-Cohen, Anschel. "Automorphisms of the loop and arc graph of an infinite-type surface." Proceedings of the American Mathematical Society, Series B 9, no. 22 (April 29, 2022): 230–40. http://dx.doi.org/10.1090/bproc/83.

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We show that the extended based mapping class group of an infinite-type surface is naturally isomorphic to the automorphism group of the loop graph of that surface. Additionally, we show that the extended mapping class group stabilizing a finite set of punctures is isomorphic to the arc graph relative to that finite set of punctures. This extends a known result for sufficiently complex finite-type surfaces, and provides a new angle from which to study the mapping class groups of infinite-type surfaces.

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30

TSUTSUMI, Seiichiro, Masahiro TOYOSADA, and Koichi HASHIGUCHI. "Extended Subloading Surface Model Incorporating Elastic Boundary Concept." Journal of applied mechanics 9 (2006): 455–62. http://dx.doi.org/10.2208/journalam.9.455.

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31

Dunn, Lawrence, and Jamie Vicary. "Surface Proofs for Nonsymmetric Linear Logic (Extended Abstract)." Electronic Proceedings in Theoretical Computer Science 238 (January 17, 2017): 33–43. http://dx.doi.org/10.4204/eptcs.238.4.

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32

Turban, L., D. Karevski, and F. Iglói. "Extended surface disorder in the quantum Ising chain." Journal of Physics A: Mathematical and General 32, no. 21 (January 1, 1999): 3907–18. http://dx.doi.org/10.1088/0305-4470/32/21/304.

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33

Chen, Kuo‐Jen, Jiing‐Yih Lai, and Wen‐Der Ueng. "An extended surface fitting algorithm for random data." Journal of the Chinese Institute of Engineers 30, no. 5 (July 2007): 863–76. http://dx.doi.org/10.1080/02533839.2007.9671313.

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34

Kadam, Reshma, Jaee Ghawali, Mario Waespy, Michael Maas, and Kurosch Rezwan. "Janus nanoparticles designed for extended cell surface attachment." Nanoscale 12, no. 36 (2020): 18938–49. http://dx.doi.org/10.1039/d0nr04061d.

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35

Cassenti, Brice N., George J. Nelson, Matthew B. DeGostin, Aldo A. Peracchio, and Wilson K. S. Chiu. "Analytical solutions for extended surface electrochemical fin models." Journal of Power Sources 265 (November 2014): 282–90. http://dx.doi.org/10.1016/j.jpowsour.2014.02.113.

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36

Montáns, Francisco-Javier. "Bounding surface plasticity model with extended Masing behavior." Computer Methods in Applied Mechanics and Engineering 182, no. 1-2 (February 2000): 135–62. http://dx.doi.org/10.1016/s0045-7825(99)00089-4.

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37

da Cunha, M. P. "Extended investigation on high velocity pseudo surface waves." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 45, no. 3 (May 1998): 604–13. http://dx.doi.org/10.1109/58.677605.

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38

Reiche, D., M. Oelschläger, K. Busch, and F. Intravaia. "Extended hydrodynamic description for nonequilibrium atom-surface interactions." Journal of the Optical Society of America B 36, no. 4 (March 19, 2019): C52. http://dx.doi.org/10.1364/josab.36.000c52.

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39

HART, DEAN E., and KATHERINE L. SHIH. "Surface Interactions on Hydrogel Extended Wear Contact Lenses." Optometry and Vision Science 64, no. 10 (October 1987): 739–48. http://dx.doi.org/10.1097/00006324-198710000-00005.

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40

Fowler, P. W., and W. W. Porterfield. "An extended tensor surface harmonic theory of clusters." Inorganic Chemistry 24, no. 22 (October 1985): 3511–18. http://dx.doi.org/10.1021/ic00216a008.

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41

Schnur, Gerhard F. O., and Kalevi Mattila. "Optical Observing Techniques for Faint Extended Surface Brightness." Symposium - International Astronomical Union 139 (1990): 461–62. http://dx.doi.org/10.1017/s0074180900241296.

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The measurement of faint extended surface brightness at a level of a few S10 is hampered by the disturbingly bright contributions of the Light of the Night Sky (LONS), consisting of, among others, the zodiacal light, airglow, and integrated starlight. Special observing techniques are necessary for investigations of the diffuse light in clusters of galaxies (DLCG) and for the determination of the extragalactic background light (EBL). We argue for the two-telescope method as an effective means to compensate for the bright components of the LONS, which will allow an accurate determination of faint extended surface brightnesses.

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42

Turban, L. "Aperiodic extended surface perturbations in the Ising model." European Physical Journal B 11, no. 2 (September 1999): 273–85. http://dx.doi.org/10.1007/bf03219169.

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43

Razelos, Panagiotis. "A Critical Review of Extended Surface Heat Transfer." Heat Transfer Engineering 24, no. 6 (November 2003): 11–28. http://dx.doi.org/10.1080/714044411.

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44

Turban, L. "Aperiodic extended surface perturbations in the Ising model." European Physical Journal B 11, no. 2 (1999): 273. http://dx.doi.org/10.1007/s100510050938.

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45

Butler, D. A., C. C. Brunner, and J. W. Funck. "Wood-Surface Feature Classification Using Extended-Color Information." Holz als Roh- und Werkstoff 59, no. 6 (December 1, 2001): 475–82. http://dx.doi.org/10.1007/s001070100238.

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46

Mansoor, M. M., J. O. Marston, I. U. Vakarelski, and S. T. Thoroddsen. "Water entry without surface seal: extended cavity formation." Journal of Fluid Mechanics 743 (March 4, 2014): 295–326. http://dx.doi.org/10.1017/jfm.2014.35.

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AbstractWe report results from an experimental study of cavity formation during the impact of superhydrophobic spheres onto water. Using a simple splash-guard mechanism, we block the spray emerging during initial contact from closing thus eliminating the phenomenon known as ‘surface seal’, which typically occurs at Froude numbers $\mathit{Fr}= V_{0}^{2}/(gR_{0}) = O(100)$. As such, we are able to observe the evolution of a smooth cavity in a more extended parameter space than has been achieved in previous studies. Furthermore, by systematically varying the tank size and sphere diameter, we examine the influence of increasing wall effects on these guarded impact cavities and note the formation of surface undulations with wavelength $\lambda =O(10)~ \mathrm{cm}$ and acoustic waves $\lambda _{a}=O(D_{0})$ along the cavity interface, which produce multiple pinch-off points. Acoustic waves are initiated by pressure perturbations, which themselves are generated by the primary cavity pinch-off. Using high-speed particle image velocimetry (PIV) techniques we study the bulk fluid flow for the most constrained geometry and show the larger undulations ($\lambda =O (10~ \mathrm{cm}$)) have a fixed nature with respect to the lab frame. We show that previously deduced scalings for the normalized (primary) pinch-off location (ratio of pinch-off depth to sphere depth at pinch-off time), $H_{p}/H = 1/2$, and pinch-off time, $\tau \propto (R_{0}/g)^{1/2}$, do not hold for these extended cavities in the presence of strong wall effects (sphere-to-tank diameter ratio), $\epsilon = D_{0}/D_{tank} \gtrsim 1/16$. Instead, we find multiple distinct regimes for values of $H_{p}/H$ as the observed undulations are induced above the first pinch-off point as the impact speed increases. We also report observations of ‘kinked’ pinch-off points and the suppression of downward facing jets in the presence of wall effects. Surprisingly, upward facing jets emanating from first cavity pinch-off points evolve into a ‘flat’ structure at high impact speeds, both in the presence and absence of wall effects.

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47

Shah, Ramesh K., S. Q. Zhou, and Kaveh A. Tagavi. "The Role of Surface Tension in Film Condensation in Extended Surface Passages." Journal of Enhanced Heat Transfer 6, no. 2-4 (1999): 179–216. http://dx.doi.org/10.1615/jenhheattransf.v6.i2-4.100.

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48

GOTOH, Yasuhito. "From Ultimate “Vacuum and Surface Science” to Extended “Vacuum and Surface Science”." Vacuum and Surface Science 61, no. 6 (June 10, 2018): 347. http://dx.doi.org/10.1380/vss.61.347.

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49

Hu, Kun, Matthew G. Baring, Joseph A. Barchas, and George Younes. "Intensity and Polarization Characteristics of Extended Neutron Star Surface Regions." Astrophysical Journal 928, no. 1 (March 1, 2022): 82. http://dx.doi.org/10.3847/1538-4357/ac4ae8.

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Abstract The surfaces of neutron stars are sources of strongly polarized soft X-rays due to the presence of strong magnetic fields. Radiative transfer mediated by electron scattering and free–free absorption is central to defining local surface anisotropy and polarization signatures. Scattering transport is strongly influenced by the complicated interplay between linear and circular polarizations. This complexity has been captured in a sophisticated magnetic Thomson scattering simulation we recently developed to model the outer layers of fully ionized atmospheres in such compact objects, heretofore focusing on case studies of localized surface regions. Yet, the interpretation of observed intensity pulse profiles and their efficacy in constraining key neutron star geometry parameters is critically dependent upon adding up emission from extended surface regions. In this paper, intensity, anisotropy, and polarization characteristics from such extended atmospheres, spanning considerable ranges of magnetic colatitudes, are determined using our transport simulation. These constitute a convolution of varied properties of Stokes parameter information at disparate surface locales with different magnetic field strengths and directions relative to the local zenith. Our analysis includes full general relativistic propagation of light from the surface to an observer at infinity. The array of pulse profiles for intensity and polarization presented highlights how powerful probes of stellar geometry are possible. Significant phase-resolved polarization degrees in the range of 10%–60% are realized when summing over a variety of surface field directions. These results provide an important background for observations to be acquired by NASA’s new Imaging X-ray Polarimetry Explorer X-ray polarimetry mission.

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50

Haq, Kazal, Kamal Shah, and Thabet Abdeljawad. "Analysis of periodic heat transfer through extended surfaces." Thermal Science, no. 00 (2022): 184. http://dx.doi.org/10.2298/tsci220502184h.

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This article is concerned with the review of periodic heat transfer through extended surfaces known as fins. In this review, we bring out the detail study of heat transfer of periodic type variation through extended surfaces. Heat transfer which has been remained a warm area of research under various conditions for the researchers in last many decades. In the current analysis, an attempt is appointed to study, analyze and summarize the result of the periodic heat transfer and flow in various fins. Further, we are carried out the analysis for the periodic heat transfers through various kind of extended surface also called fins in the presence of periodic base and ambient temperature. The performance of the extended surface is expressed in terms of the fin effectiveness and its efficiency. The heat transfer process is regulated by three experimentally determined dimensionless parameters such as the frequency parameter w, the convectional fins parameter N, and the amplitude parameter A. Further the fins performance and efficiency are demonstrated through several examples.

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