Rifat Ara Rouf

• PhD
• Professor (Associate) at Independent University

he stability of unsteady two-dimensional magnetohydrodynamic squeezed nanofluid flow with heat transfer through two parallel disks is examined in this paper. The lower disk is considered porous, and four different-shaped Co, Ni and Al2O3 nanoparticles are dispersed in the pure fluid. The viscous dissipation effect is considered, and Hamilton and Cr...

In order to have a precise knowledge on how pressure gradients and buoyancy force affect fluid flow and energy distribution in a bending channel, it is important to perform a comprehensive study on flow characteristics and heat transfer mechanisms that trigger out the transition of fluids into a turbulent state, subject to a sustained pressure grad...

Adsorption technology is considered as one of the premier alternatives using green energy. Conventional two-bed basic adsorption cooling and refrigeration systems run by solar heat are well stablished for their working principle and environment friendly operations. But the main challenge for this system is the huge footprint. Starting from the sola...

This paper discusses two investigations which indicate the beneft of exploiting multiple adsorption containers to increase the cooling energy output of a limited supply of solar heat. First, the optimum working conditions on the output of a solar-powered 3-bed adsorption cooling scheme working in a series and secondly, the performance of a new para...

Adsorption technology is one of the alternatives to reduce the usage of fossil fuel. Among the variety of adsorbent-adsorbate pairs, silica gel and water is the most desired one due to its preferred properties. This pair is widely available, environmentally benign and can be activated with lower temperature heat source. In order to utilize silica g...

Heat recovery ensures optimum usage of the collected energy, and thus, minimizes heat loss for a solar adsorption chiller. Two-bed adsorption chiller with conventional single stage, run by direct solar coupling with heat recovery, has been studied mathematically. In a heat recovery adsorption refrigeration system, to facilitate heat transfer, heat...

Conventional solar heat-driven single stage two bed chillers demand a large area for installation of solar thermal collector to activate the chiller, but in a highly populated tropical country open spaces is insufficient. In the intention to utilize accessible solar energy with better performance, a mathematical investigation is carried out with a...

A two bed basic adsorption chiller run by solar heat is investigated to get a fixed chilled water outlet temperature. Generally, a solar heat driven adsorption chiller, being activated with intermittent heat source, cannot produce uniform cooling. In this context, it is found that the flow rate of inlet chilled water can help to keep the evaporator...

A solar heat driven cooling system utilizes abandoned solar radiation, plays an important role in preservation of primary energy, prevents sound pollution and chlorofluorocarbon (CFC)/hydro-chlorofluorocarbon (HCFC) free environment. Other than the installation and commissioning cost, the running cost of this system can be reduced to its bare minim...

The performance of mass recovery for solar adsorption cooling system has been investigated numerically. Solar adsorption cooling appears to have a prospect in tropical region. Though it has a huge installation cost, its long term payback could be a considerable fact. Mass recovery scheme increases Average Cooling Capacity (ACC) and Coefficient of P...

An insulated storage tank has been added with adsorption cooling system run by solar heat collected by CPC panel. It has been expected and seen that the storage tank has a vital contribution in the performance of the chiller. The storage tank is connected with a solar heat driven single stage two bed basic adsorption chillers activated with silica...

The study investigates the effect of mass recovery process on the performance of a conventional two bed solar adsorption cooling system with direct solar coupling mathematically. In an adsorption refrigeration system, the pressure in adsorber and desorber are different. The mass recovery scheme utilizes this pressure difference to enhance the refri...

This study investigates the performance of an adsorption chiller driven by thermal heat collected from solar collectors’ panels with heat storage. The heat is reserved in a storage tank and the reserved heat is used to drive the adsorption chiller. The investigation was carried on the climatic conditions of Dhaka, Bangladesh. Heat transfer fluid go...

For the climatic condition of a tropical country like Bangladesh, solar heat driven adsorption cooling seems to have great prospect. Installation cost is one of the foremost drawbacks of such a system. Although, once installed, system maintenance and operation cost is negligible. Besides, the solar unit can not only support as a cooler for adsorpti...

A solar heat driven basic adsorption cooling system with silica-gel-water pair has been investigated analytically. Two cases have been studied. Performance of the chiller with different collector numbers, cycle time and heat storage. First, the performance of a basic adsorption cycle directly coupled with solar collector has been studied. Later, th...

Adsorption solar cooling appears to have prospect in the tropical countries. The present study investigates the effect of operating conditions on the performance of solar powered adsorption chiller for the climatic condition of Dhaka (Latitude 23 46 N, Longitude 90 23 E). A set of mathematical equations has been utilized to investigate the performa...

An analytical investigation has been conducted on the performance of an adsorption chiller driven by solar collector panel for the climatic condition of Dhaka. A set of mathematical model and simulation technique are exploited to investigate the system performances of solar driven basic adsorption chiller with silica gel-water as adsorbent/adsorbat...

An analytical investigation has been conducted on the performance of an adsorption chiller driven by solar collector panel for the climatic condition of Dhaka. A set of mathematical model and simulation technique are exploited to investigate the system performances of solar driven basic adsorption chiller with silica gel-water as adsorbent/adsorbat...

The multiple singularity behaviour of flow through a porous pipe with decelerating wall is numerically studied in the present paper. The steady axisymmetric flow of a viscous incompressible fluid driven along a pipe by the combined effect of the wall deceleration and suction is investigated. Our approach uses the power series in order to observe th...

The multiple singularity behaviour of flow through a porous pipe with decelerating wall is numerically studied in the present paper. The steady axisymmetric flow of a viscous incompressible fluid driven along a pipe by the combined effect of the wall deceleration and suction is investigated. Our approach uses the power series in order to observe th...

An analytic investigation on the prospect of solar cooling for the climatic condition of Dhaka is presented. The simulation is done based on the area of the solar radiation collector and cycle time of the adsorption cooling unit. It is found that 14 CPC collectors each of area 2.42m² is required to run the system with base run conditions. It is...

The singularity behaviour of nonlinear problems in fluid dynamics is numerically investigated in the present paper. The behaviour of the first Painlev'e transcendent is introduced as a model problem. Then the laminar unsteady flow of a viscous fluid away from a plane stagnation point is studied as second model problem. We have applied approximate m...

True information about rainfall is crucial for human activities such as the use and the management of water resources, hydroelectric power projects, warning to impend droughts or floods, urban areas sewer systems and many others. This paper investigates the development of an efficient model to forecast monthly monsoon rainfall for a number of stati...

Stock market prediction is an important area of financial forecasting, which attracts great interest to stock investors, stock buyers/sellers, policy makers, applied researchers and many others who are involved in the capital market. This paper aims to develop an efficient model to predict the Dhaka stock market index (DSPI) values using the approp...