Trying to understand flux by looking at a mess of integrals is not the way to go. A continuity equation is useful when a flux can be defined. Flux describes the flow of a physical property through space and is often coupled with a time variation. The main parameter while calculating heat transfer is heat flux. In mathematics and physics flux is used as the basic and global word. Physics revision site - recommended to teachers as a resource by AQA, OCR and Edexcel examination boards - also recommended by BBC Bytesize - winner of the IOP Web Awards - 2010 - Cyberphysics - a physics revision aide for students at KS3 (SATs), KS4 (GCSE) and KS5 (A and AS level). First get an intuitive understanding, and the details will make more sense. They are used in both extractive metallurgy and metal joining. The word “Flux” is originated from the Latin Word ‘Fluxus’ that means flow. The rate of heat transfer per unit area normal to the direction of heat transfer is called heat flux.Sometimes it is also referred to as heat flux density.In SI its units are watts per square metre (W.m −2).It has both a direction and a magnitude, and so it is a vector quantity. Conversely, the magnitude of the field is given by the flux per unit area. Flux is depicted as "lines" in a plane that contains or intersects electric charge poles or magnetic poles. Rosin used as flux for soldering. Help with GCSE Physics, AQA syllabus A AS Level and A2 Level physics. Isaac Newton first used this term as fluxion into differential calculus. Note that bold text indicates that the quantity is a vector Flux means an imaginary lines through which a physical quantity can travel. The way that this quantity q is flowing is described by its flux. List of common physics notations 1 List of common physics notations Latin characters Symbol Meaning SI Unit of Measure area magnetic vector potential Amplitude acceleration meter per second squared (m/s²) or (ms−2) magnetic flux density also called the magnetic field density or magnetic induction tesla (T), or equivalently, If the field is constant over the area of interest, the flux is simply the product of the field and the area. A flux is the value of the surface integral of any vector field. Flux is the presence of a force field in a specified physical medium, or the flow of energy through a surface. Heat flux is the rate of thermal energy flow per unit surface area of the heat transfer surface, e.g, in a heat exchanger. Flux is the presence of a force field in a specified physical medium, or the flow of energy through a surface. In electronics, the term applies to any electrostatic field and any magnetic field . In electronics, the term applies to any electrostatic field and any magnetic field . Heat Flux Density – Thermal Flux. Insights. This is a list of common physical constants and variables, and their notations. In physics, there are a large number of physical quantities we include while performing calculations. To make it more convenient for users and easier to use and remember, we often use notations/symbols to represent these physical quantities. There are 3 types of generalized classification is there that helps to distinguish between heat fluxes by convection, heat conduction, and radiation. Flux is a common phenomenon throughout the natural world and has become a ubiquitous concept throughout physics and mathematics, and hence technology. Fluxes may have more than one function at a time. Flux is relatively simple to understand, and is really helpful in vector calculus and physics. 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