CFD Consulting Services

We providing consulting services that apply to various spectrum of CFD analysis. Before starting your CFD Analysis project we create CAD geometry and develop an excellent quality mesh representation.

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HVAC Analysis Services and Design: a quick overview on its utility

HVAC Analysis Services and Design have emerged as one of the most important parts of structural designing, engineering industry specially in designing aircraft, car compartment, vehicle and train compartment, etc. HVAC is the abbreviation of heating, ventilation, as well as air conditioning arrangement for comfort inside vehicles’ compartment as well as for indoor area of a premise. Predominantly being a sub-discipline of mechanical engineering HVAC and works mainly on the principles of fluid mechanics, thermodynamics, and rules of heat transfer, etc.

Nowadays environment friendliness has become one of the most talked about features of building and motor vehicles because along with energy efficiency environment friendliness has taken into prime consideration these days by engineers, architectures as well as for the consumers as well. There are several instances that in making big aquariums, designers take support of HVAC friendly designing so that healthy aqua conditions remain prevalent for its habitants. The same is applicable for architects also in designing skyscrapers and big industrial complexes. With proper implementation of HVAC design, use of fresh air from outdoor are best enjoyed as well as  natural control of temperature and humidity gets naturally controlled. For all these benefits and short and long term benefits, HVAC Analysis Services and Designs are highly in demand now.

The main purpose of a Heating, Ventilation, and Air-Conditioning (HVAC) system is to sustain and maintain fresh indoor air quality via ample ventilation added with robust filtration system to provide optimum thermal comfort.  Modern HVAC systems are among the best energy efficient system installed for fighting energy crisis. The meticulous choice and right design of an efficient HVAC system can also influence plenty of high performance goals, like proper water consumption via water-cool air conditioning equipment as well as use of acoustics.

Some of the salient features of HVAC design

Regardless the size, HVAC designs incorporate some specific features like easy accessible doors, all cabinet with double wall, cabinet with tight air seal, quality gaskets with double wall doors, thick  filter slot, air filter and sensitive air filter monitor s are some integral components of a well structured HVAC design. Energy efficiency and optimum comfort backed by environment friendliness are the key aspects of an improved HVAC system. Therefore external components used and recommended in HVAC Analysis Services and Design are always found weather resistant type which can withstand the torment and wear tear due to climate fluctuation.

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General Information about Computational Fluid Dynamics (CFD)

Computational Fluid Dynamics popularly known as CFD is an analytical tool that delivers qualitative forecast of fluid flows by means of mathematical modeling, numerical procedures, and software tools. But before we discuss about CFD it is important to understand fluid flow. We see fluid flows in our day-to-day life regularly. They include rain, wind, storms, floods, fires, air contamination, boiler, freshening and air conditioning of buildings, cars etc., combustion in automobile engines, processes in human body including blood movement, inhalation, drinking etc.

CFD helps scientists and engineers to execute numerical experiments using virtual flow laboratory. Now the question is why do we use CFD so extensively? The answer is it helps architects to design comfortable and safe sounding houses with good environment. The other benefits of CFD include:

It helps chemical engineers to exploit the harvest from their equipment

It helps surgeons to cure major diseases

It helps safety specialists in decreasing health dangers from energy and other hazards

It helps military organizations to cultivateweaponries and evaluate the damage

It also helps CFD experts to make big money by selling colorful images

The problem with CFD simulation is that they are never 100% accurate which makes it very difficult to precisely quantify the input data. There are other reasons for the inaccuracy which includes:

The input data may include too much estimating or inaccuracy

The mathematical model of the problem in influence may be insufficient

The precision of the results is restricted by the accessible computing clout

The other important thing to know is how CFD makes prediction. Let us take a close look at the answer: CFD employs computer to resolve complex mathematical equations. The various mechanisms necessary for a CFD design include:

CFD specialist

Technicalinformation

Software

Hardware

Each of these components plays a very important role in CFD analysis services.

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The Correlation between CFD and Power Plant Ventilation Systems

Power generation plants are very complicated to build. It takes lots of planning to decide the type of ventilation systems required for power plants. It is not individually related to calculations to decide the ventilation systems nor is it based on drawings alone. There needs to be right type of climate control tools available to build a power generation plant. Here, CFD plays a very important role. Computational Fluid Dynamics (CFD) is a very popular simulation method that is used to calculate the flow of fluids in the power generation plants. After artificial simulation in real life circumstances it becomes easier to predict the flow of ventilation systems in power plants.

Now each and every building contains a different type of conditional habituation hence there is a need to gauge the internal climate of the power plant which is affected by various factors such as location, orientation, materials used in its construction and its functions. All these factors have an important role in the overall seasonal change in weather conditions along with temperature inside in the power plant.

We also know that power plants are affected by excessive heat and humidity, contaminants resulting from power generation process, and odor in case energy from waste facilitates. Since it is a very complicated structure it becomes very difficult to calculate the way air flows in the building.

A good ventilation system is the answer to all these problems and that can be realized by means of computational fluid dynamics (CFD). With the help of a good CFD model; it is possible to create an internal environment which is not affected by the changes in the conditions. With the help of 3D CFD models it is possible to investigate mass flows, heat transfer and associated phenomenon so that expected effects on temperatures, air speeds, emissions and pressures. With the help of CFD it is possible to take necessary actions in case there are different reactions and address the issues quite effectively.

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CFD Analysis of Heat Exchanger

Computational Fluid Dynamics (CFD) has gained lots of attention in recent times due to the competitive edge it gives to the product in a highly competitive environment. Companies are devising new ways to improve the quality of the product; and thus staying ahead in the competition. In this article; we will discuss about the CFD simulation of heat exchanger. The CFD analysis software has become one of the biggest advantages while conducting CFD analysis of heat exchanger. While there are lots of experiments being done on heat exchanger, the one using CFD package FLUENT has been the most useful amongst them.

Heat exchangers are utilized as a heat exchanger fluent to transfer from one designed plate heat exchanger to another. Heat exchangers are sometimes used as condensers; hence cloud condensation can occur in the heat exchangers. Condensation plays a very important role in parallel flow heat exchanger applications. The CFD analysis of heat exchanger works on designer plates using CFD. Different heat exchangers are named according to their applications. There are different types of heat exchanger that can be used for CFD analysis. But CFD software is of primary importance in the scenario.

The plate heat exchanger possesses grooved plates amassed in frame. Plate and frame exchangers are being used for liquid to liquid heat transfer. The basic reason for that being design plate heat exchangers using CFD. The CFD analysis software is being used quite popularly for heat exchangers nowadays; and we are seeing a new wave of CFD simulation of heat exchanger in the market. Heat exchangers are being readily used in process industries. With different types of heat exchanger prevailing in the market; it becomes very easy to conduct CFD analysis of the equipment, and conduct the experimentation to get best results from the CFD software.

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Computational Fluid Dynamics (CFD) for Rotating Components

Computational Fluid Dynamics (CFD) is a perfect tool for studying rotating components. A glance at such disparate machines such as pumps, table fans, axial fans for electronic cooling and hair dryers, shows that they all have one thing in common: rotating components.

Engineers who design equipment with rotating components need to analyze and understand the behavior of those components if they want to improve performance. For example; if the blades of the table fan are in the wrong shape or if they’re incorrectly oriented, the fan may generate little to no air.

CFD helps engineers study many of the issues involved in rotating component behavior. It provides a way to save a great deal of time and money in obtaining the necessary information, and assists engineers in designing better quality rotating equipment.

The use of CFD makes it possible to eliminate expensive physical prototypes, and find serious flaws much earlier in the design process. Starting with CFD basics, this article will give engineers an overview of how users of HiTech CFD can solve typical problems.

Several different approaches can be used to study flow in and around rotating equipment. In the majority of rotating machinery fluid-flow analyses, engineers model the flow in a steady-state manner. The term “steady-state” refers to a solution that does not vary with time.

A very simplified approach called Single Rotating Reference Frame, which assumes that the entire fluid domain or region rotates with the rotor or impeller, can be used to study the flow around the impeller blades. However, because this doesn’t consider any effects of the pump casing on the flow, it is insufficient for analyzing a full pump system.

To study the whole flow pattern and see the effects of the stationary pump casing, baffles, and other internal parts, users need more comprehensive methods, such as Multiple Rotating Reference Frame, also a steady-state approach, the engineer assigns zero revolutions per minute (RPM) to nonrotating components, called stators, and fixed RPMs to the rotating components, called rotors. With this method, users can consider more than one rotor, each rotating with a different RPM.

The Sliding Mesh method is a transient approach that is useful for rotating flow problems requiring a time-accurate solution for computing the unsteady flow field. It requires a very large number of time steps to arrive at the transient solution, making the process time-consuming as well as computationally demanding, and may turn out to be impractical on desktop computers.

HiTech CFD Simulation uses both the single and multiple rotating reference frame approaches to solve rotating flow problems. Overall, the program employs configuration-based fluid-flow analysis coupled to SolidWorks software assembly configurations to enable a wide variety of “what if” scenarios. Every flow study either creates a new configuration or can link to an existing SolidWorks software configuration. The software aims to solve the majority of possible rotating equipment problems, and to do so quickly. For the sake of speed, HiTech CFD Simulation does not use the transient approach.

Posted by Mehul Patel – CFD Consultant at HiTech CFD.

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3 Finger-Thumping Myths of CFD and the Realities Associated with it

Computational Fluid Dynamics (CFD) simulation has always been considered a very difficult subject to handle. But now things are changings quite rapidly. We are seeing lots of changes in the way CFD is being persuaded. Now people are keener on understanding the benefits of CFD ignoring the negative points. But there is still a section in the audience that has lots of doubts regarding CFD. In this article; we will look at some of the myths regarding CFD and the realities associated with it. So let us start off the journey: Myth:CFD is very complex to be used in design process Reality: It has been found that there are many mechanical engineers who are not familiar with CFD tools which was quite an astonishing fact to learn. But now things have changed radically.  Since a decade or so there has been a growing impetus amongst mechanical engineers to learn about CFD tools and we are now seeing deep awareness of CFD in them to get adequate results. New technology has enabled the use of CFD software quite easy and we are now seeing that mechanical engineers are using this tool quite easily as the manual tuning feature has been removed totally and now everything is automatic. The only thing that a mechanical engineer needs to know while using CFD tools is adequate knowledge of CAD system and physics of the product. Myth: It takes a lot of time to use CFD in the designing process Reality: We have already discussed that earlier CFD software had to used manually hence it used to take lot of time in meshing process. But since the new version has been launched everything has become automatic and now with the help of 3D CAD data is directly used for fluid flow simulations without the need for translations or copies. The automatic mesher as discussed earlier creates the mesh while maintaining the skewness and aspect ratio hence; there is no need for any manual work. The results are quite quick and design changes can be meshed within minutes. Hence; this is absolutely incorrect to say that it takes lot of time to use CFD in the designing process. Myth: CFD is costlier hence; it cannot be used by mechanical engineers Reality: Earlier version of CFD software used to be very expensive to purchase by mechanical engineers as traditional CFD costs used to cost $ 250,000 to lease per year. But with the latest version of CFD software this is not true. Now this software can be assessed for $ 25,000 at perpetual license with an yearly maintenance fees of 18%. This software requires minimal training and is very user friendly. This software can be assessed using the same CAD environment as the engineers are familiar with hence; it is very useful. Moreover, it can run easily on computer and laptops at a very reasonable cost.

Posted by Mehul Patel – CFD Consultant at HiTech CFD.