Radiation Heat Transfer

-
Image
View Factor Orientation (or View factor or shape factor) plays an important role in radiation heat transfer. View factor is defined as, "fraction of radiation leaving surface 'i' and strike 'j' ". Summation Rule (View Factor) If there is are similar surfaces 'i' and 'j' , then: Blackbody Radiation Exchange Radiation Exchange between Opaque, Diffuse, Gray surfaces in an Enclosure 1. Opaque 2. Surfaces 3. Two surface enclosure Radiation Shield It is used to protect surfaces from radiation act like a reflective surface. References: Material from Class Lectures + Book named Fundamentals of Heat and Mass Transfer by Theodore L. Bergman + My knowledge.  Photoshoped pics  are developed.  Some pics and GIF from Google.   Videos from YouTube ( Engineering Sights ).
Post a Comment

Hydrographic survey

-

HYDROGRAPHIC SURVEY 

Hydrographic survey is an art or technique of determining the depth of water bodies( lakes, rivers, sea ports, and oceans, etc.; that is called Bathymetry. You can know the hidden features under the water surface by the knowledge of hydrographic survey. By the detailed knowledge of hydrography and bathymetry, these biggest industries such as oil refineries, ports, shoreline offices for different purposes, etc.

References:

  • Combined project on Hydrographic Survey by Taha Nasir, Rameez, Anas & Talha Shafique.

Comments

Post a Comment

HI, we wI'll contact you later

Popular posts from this blog

Corrections Of Tape

-
Image
TAPING CORRECTIONS There are two types of corrections depending upon the type of errors in tape due to the different conditions.  1. Systematic Errors : Slope Erroneous tape length Temperature Tension Sag 2. Random Errors : Slope  Alignment Marking & Plumbing Temperature Tension & Sag 1. Temperature Correction  It is necessary to apply this correction, since the length of a tape is increased as its temperature is raised, and consequently, the measured distance is too small.  It is given by the formula,                         C t  = 𝛼 (T m  – T o )L Where,   C t  = the correction for temperature, in m.      𝛼 = the coefficient of thermal expansion.    T m  = the mean temperature during measurement.          T o  = the temperature at which the tape is standardized.       L = the measure length in m. For Foot Unit :                          C t  = 6.45×10^-6  (T m  – 68 )L For Metric Unit :                          C t  = 1.16
Read more

Planar Kinetics Of A Rigid Body: Force & Acceleration

-
Image
Mass Moment Of Inertia : The applied non-concurrent force system can cause the body to translate and rotate. The resistance of a body to angular acceleration is called Mass Moment of Inertia or simply Moment of Inertia ( M = Iɑ ). Mass moment of Inertia (MOI) is the integral of 2nd moment about any axis of all the element of mass 'dm'. For e.g: flywheel of engine. If the density of the body is not homogeneous, then you should use the following formula Parallel Axis Theorem:  If the moment of inertia passing through its own axis, then moment of inertia about any parallel axis is given by using Parallel Axis Theorem. Moment of inertia can be reported about a specified axis as radius of gyration. And, the moment of inertia for different shapes but most important of these are disk and rod. If composite body is given and moment of inertia is required, then you calculate MOI as: Planar Kinetic Equations Of Motion: There are two type
Read more

Bulk Forming Processes

-
Image
Bulk Forming Processes: Bulk refers to workparts with low surface area to volume ratio. Bulk Forming uses heavy machine to apply three dimensional stresses. There are 4 basic operations used for bulk deformation: Rolling Forging  Extrusion Wire & Bar Drawing 1. Rolling: Deformation process in which work thickness is reduced by compressive forces exerted by two opposite rolls. Variations in rolling are described ahead: A. Types of Rolling Based on Workpiece Geometry: I. Flat Rolling: It is used to reduce thickness of a rectangular cross-section. II. Shape Rolling: It is used to deform workpiece into contoured cross-section. B. Types of Rolling Based on Work Temperature: I. Hot Rolling: The material is heated to a uniform elevated temperature to achieve significant deformation. Parts are free from residual stresses. II. Cold Rolling: Hot materials (like plates or sheets) are further flatten by cold rolling to prepare them
Read more